Rescue from Rainbow Monster is a cut-the-rope puzzle game where you have to help the monster get out of the invaders' spaceship.
In each level, you have to cut Red's rope with your mouse or by swiping through it with your finger on a mobile device. This lets Red fall free and get through the door to the next level, but you also have to try to make him fall into the coins and collect all three of them.
Have fun and good luck!