There are some really nice touches in this game. The circular health bar is a creative one! I would have slapped on a standard bar and be done, but this is a great idea! There were cool mechanics also, such as proximity activated attacks of the polygons, and the energy orbs on death. The impact of the hits was good, with the particleFX and damage numbers.
Would love to see this fleshed out with more art assets, the bones for a good game is already there. Things like upgrades or more attack types would be great polish.