Here's a video if you're more into a visual guide (video originally by AchievementLand and BiLLzuMaNaTi):
Start up Normal level 1 for some basic movement introduction. I find the game to be a bit unresponsive and slippery, so it'll take some time to compensate for that. Start off by running forward and jumping the gap. Go right, jump again, and then jump left to cut the corner at the end of this stretch of platform. Jump into the portal to end the level. If you did all this in under 10 seconds you'll get:
Complete a level with 3 stars.
No worries if you didn't, you'll probably get it while playing or you can just replay this level. The 2nd level introduces purple bullets which you can fire using . Follow the path and shoot the purple enemy with your new bullets for:
From this point on, you may die either by enemy fire or just falling off the map. If you do, you'll unlock:
After killing the enemy follow the path to the portal. Next level you are given access to yellow bullets with . Jump through this level from side platform to side platform, shooting the yellow enemy when you're in range. Exit through the portal at the end. In this next stage jump ahead, then turn and face the gray block. Shoot him to earn:
This will also force you to restart, so now just jump from platform to platform and don't bother shooting at all until you reach the portal at the end. This next level starts you in front of some lasers, turn around and jump down the path to the left. At the end of it you'll see 6 platforms, 3 have spikes and 3 don't. I think you can figure out which ones you need to jump on to reach the end of the level and unlock:
The next level is very similar to the last. There's spiked platforms all around with only one path through them. Jump across the spikeless platforms to reach the portal. The next stage introduces jump pads. Hop on all 3 of them to keep gaining elevation. The next 3 jumps across the blue platforms are pretty slippery, so slowly move across them to reach the end. Jump down and make your way up to the long green bridge up top then shoot the blocks with the corresponding color to make them disappear. You don't need to destroy them all to progress. Just 2 blocks from one row is usually enough to jump over and move on. Exit through the portal once more. Run around the sawblades to avoid them then jump pad up higher. The first black enemy attacks you from below. You can only kill them with ricochet shots. Fire at them from up top until a bullet bounces onto them to get:
Jump down and over the spikes, make your way up top and exit the level. Destroy the blocks to start off then use the jump pads to reach the level exit for:
Jump through the laser obstacles and over the sawblades then maneuver around the stationary lasers. Kill the yellow and black enemies on the next ledge and finish the stage. Jump up the platforms to the top of this area and kill all 3 enemies, but be wary of the well hidden laser trap just behind the black enemy. Jump over it, destroy the blocks then exit the stage. These enemies change colors, so shoot them right after they switch so you have time to kill them before they change back. Kill them both, jump over the spikes and finish the level. Destroy the blocks and black enemy in front of you then hug the building as you move around the ledge. Drop down and jump across the gap, moving along the outside of the next structure. Kill the enemy, follow the path, and jump to the platform with the portal. This next stage is weird. Start off by avoiding the lasers in the center and killing the enemy. Now wait for the lasers to rotate away from the center so you can run through and reach the jump pads across the bridge. Take them up to finish the level and earn:
The next stage has no obstacles, just platform your way to the end. In the next level, you'll have to turn around again and follow the straightforward path around the area to reach the portal. Be sure to keep an eye on the rotating laser so you can jump over it when it crosses your path. In the next level, don't shoot the blocks, walk around the outside of them and be sure to avoid the jump pads on the bridge. You also have to jump to the portal this time since it's a bit off the ground. Avoid the sawblades, jump pad up and kill the 2 enemies. Follow the path back down and avoid the spikes, quickly jumping across the platforms and moving over and under the rotating lasers to finish the stage. The lasers in the next stage are stationary, so jump between them and onto the platform to the right. Jump over the spikes here and back between the lasers. You can kill the enemy up top if you desire, but you can reach the end without killing him or destroying the blocks in your path. Finishing this level earns you:
Follow the bridge around, jumping to avoid lasers in your way. Once you reach the jump pad, move up and repeat the process to finish the stage. No enemies to kill here so ignore the grays, jump to avoid the sawblade and jump between the lasers. Avoid the jump pad along the bridge and then make your way to the exit. Sidestep the blocks here and fire down at the black enemy, then time your jump to avoid the laser below. Avoid it with another jump, then make your way up. Avoid the lasers here and make your way to the end, avoiding the blocks to reach the portal. Start off by killing the changing enemy below, then make your way up to the platform with the gray enemy. Look over the edge to find the last jump pad, fall onto it and bounce up to the portal. Destroy the blocks here and kill the 2 enemies, avoiding the lasers as you move ahead. Jump across the gap and continue to avoid lasers to the end of the level to finish up the main game for:
At the main menu, choose Special levels and start with 1S. This is the first level with the addition of 2 yellow enemies. Kill them and end this level quickly. This next level has a black and purple enemy but is very linear. Kill them both and end the level. The 3rd level has a few enemies as well. Kill them while jumping around to reach the end of the level. This will earn you:
Complete 3 special levels.
Kill the yellow enemy to start then fire at the ground as you jump to take out the black enemy more easily. This will end the level fairly quickly. Turn around to avoid the lasers, killing the enemy up high, and avoiding the spikes and sawblades same as before. You start the next level under assault. Quickly start moving and kill the enemy. Follow the path around to avoid the spikes while killing the 2nd enemy, ending this level and the game:
It's that easy. Enjoy your completion!
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