More fun than I was expecting, once I understood the mechanic, and quite difficult. Enemies seemed to increase after death which was a surprising difficulty jump.

Something more than just the color in the background to indicate movement would go a long way. Felt like I wasn't moving in some moments.

I like the idea of collecting your enemies as armor, kind of has a Katamari Damacy feel to it. Lot's of potential!

threw a barrage of errors and then crashed in windows 7 64 bit. Something about Error calling finalizer closure. idk.

I got some errors on the Zip file, couldn't unzip it in Linux.

Definitely needs more of a concrete goal and a way to tell you're moving without enemies on screen, but an awesome concept. Procedurally generated baddies with various attacks based on your shape would make this an addictive-repeat play! Nice concept

Could use some texture on the background to indicate movement. The other thing it lacks is some sort of "Direction" to it. Even something as simple as a score counter would eb nice.

The gameplay itself is pretty fun, but it really needs a goal, even something like, kill all the enemies. Good work though :)