After beating a few levels, the game just quit? I don't know if it was a crash or if I beat the game.
The artwork is very cute, and the core movement is fun. The puzzle mechanics of making things bigger & smaller is simple, but effective.
The controls for the tool are a bit obtuse. Regarding pressing left click to summon the tool, pressing shift (only when the tool is active) to switch the shrink ray to expanding, and pressing E (only when the tool is active) to switch to bombs. It's a lot of steps to use the game's core mechanics.
I guess you don't want people using the tool while moving? But there are a few puzzles involving a moving block where you have to shrink the block when it arrives, quickly jump on it before it leaves, then quickly expand the block again when you reach the end and jump off. Fighting the controls there didn't really make the puzzle more challenging, just more frustrating.
I feel like you could have made the tool always active - press left click for shrink, right click for expand. And bombs can be toggled with shift since those are used more rarely. Basically, twin stick shooter controls. I didn't see puzzle solutions that could be cheesed by being able to move by using the tool but maybe I'm missing something.
All in all, a fun time!