Nice game, I like the idea of keeping the green cubes away and I like the dissolve effect when they hit the triangles.  I wish the red square would respawn though, it's easy to lose it and tough when I can't get it back :) 

If you could give me a rating/feedback on my game it would be much appreciated! :) 

The challenge is how to make the red square last longer. My score was 165. Is that too low?

Interesting game, it's fairly difficult.

Fun one! I didn't see the control scheme written out so I immediately destroyed my red block and had to figure out what was going on by myself and had a big OH NO moment when I realised what, exactly, should not be fed.

Clear graphics with concise, condensed mechanics. Just the right amount of "length" for a single level, could be infinitely varied by white cube placement/time constraints/speed for varied levels. The sphere grows a bit unevenly, the top portion hits the ceiling before it hits the ground, so that should probably be centered properly in a fix, if you update the game.
This thing's got promise! One of my faves this jam

haha, hard to master. cool game

Cool game, I like the strategy that positioning the red block adds. It's like a mix of tower defense and point & click.