LEVEL SKIP GLITCH
Looks like a lot but its a simple process.
1. Play the beginning of the chapter you are on. (Ex. 6-1)
2. Quit to the main menu.
3. Start the game again from 1-1, play all the way to the first loading screen.
4. Press Start and go back to the main menu.
5. Now when you go to chapter select, you will notice all levels are unlocked for your current chapter.
6. Now to progress further in the story you can just skip to the last level in a chapter like 8-3 and go straight to Chapter 9 w/o ever playing levels 8-1 or 8-2.
7. Repeat everytime you start a new chapter.
The whole first chapter can be done in less than 5 min rather than struggling through difficult levels with bad controls.
Note that this may just be for me as I have recently found this out, so if anyone can say this works I'll take their word for it. All you need to do is complete the last level for progression achievements.
This glitch will let you skip chapters to complete this game faster. I was able to grab this game for free so I have already got my worth but to each is own, don't judge me to hard.
Don't forget to +1 if it helped, thanks.