Little Green Blob by milanfin is a homebrew platformer game made for the Nintendo Game Boy.
In this game, you will play as a blob of green goo that shrinks as it moves or falls. Try to get to the end of a level to move onto the next one. If you want to drop down through half-height platforms, it can be done with Down+A button. If you get stuck on a level, the ‘Start’ button will return you to the main menu to skip a level.