Had a lot of fun playing! The skill tree was slick. The simple generated art works really well for this type of arcade game, not distracting at all and makes it really obvious to the player what's going on immediately. I think the enemies can be a bit dumb - I came up with a strategy of circling the perimeter of the map until the last second, allowing more red squares to spawn that I could take out in a burst with the right click, made it really easy to farm them, removing any incentive for me to buy the node that reduces red square spawns. Very fun, great job!