Very easy to get on Stage 1. Just make sure you finish each wave in the correct amount of turns (shown in the upper right). If you mess up you can restart the current wave from the menu.
Wave 1. (Max Moves: 2)
Just place the marker in front of each car. (Press a to blow up individually).
Wave 2. (Max Moves 1)
Place marker in front of red (TNT) car on the right hand side. The chain reaction will destroy the other car.
Wave 3. (Max Moves 2)
Place the marker on the left hand side. Wait until the white car is over the marker and detonate. This will create a 6 tile marker, click detonate again to clear the remaining cars.
Wave 4. (Max Moves 1)
Place the marker on the left hand side and wait for the TNT car to be above it. Detonate and the chain reaction will destroy the remaining cars.
Wave 5. (Max Moves 4)
Place markers to destroy the two small cars on the right first. Stay on the left when detonating the second car, or the ambulance will run you down. Use your remaining 2 moves to destroy the bus and car in the left lane.
Wave 6. (Max Moves 3)
Blow up first car on the right. Blow up the white car, but do not detonate the 6 grid tile until the ambulance has sped forward out of harms way. Also stay to the left when blowing up the white car to avoid being run over by the ambulance.
Wave 7. (Max Moves 2)
Blow up the first car in the left lane, while staying in the right lane to avoid the ambulance. Then Place a marker in the right lane and detonate when the TNT car is above the marker. The chain reaction will destroy the remaining cars.
Wave 8. (Max Moves 2)
Place the marker in the left lane and wait until the white car is above before detonating. This will create a 6 tile marker, detonate this immediately to destroy the remaining cars in a combo.
Wave 9. (Max Moves 3)
Blow up the first car in the right lane, to create the 6 tile marker. Detonate the 6 tile marker quickly, while staying on the left to avoid the ambulance. You should now have 1 car remaining with 1 move remaining.
Wave 10. (Max Moves 1)
You can blow up either of the TNT cars in either lane and the chain reaction will destroy the remaining cars.
Remember if you mess up you can always restart each wave from the menu.