This is a delightful and addictive game that I already had on PC. Unfortunately, on the mobile version, the tiles are tiny and difficult to read. Also, the size & speed optimization challenges (which account for 90% of the gameplay) are harder to find in this version. Make sure you talk to the boss to see them - without them the biggest challenge is reading the tiny tiles!

A clever game for beginners to computer science. Also fun for kids! A step up from Robot Turtles, but still not, say, Spacechem. The developers do a fantastic job on their games, and charm oozes out of this like so many Goo Balls sent up pipes. If you're already good at this sort of thing, the Optional Completion Distinctions will give you plenty of challenge. And it's worth it for the ending.

5/5 if not for the screen rotation bug. Screen auto-rotation is too sensitive and activates too often, flipping the screen upside-down. Also, there is no setting to turn off music and SFX. A game to teach programming, so it's heavily based in math and logic. Even if you have programming experience, it's still fun to play but will not be as challenging. However, trying to solve the optional optimization challenges (for size and speed) makes it more interesting. You can't backup your progress (I think), so it makes this more re-playable for me.