Made it to the 10th wave here, too! I liked how y'all applied the limitation here, but the collision boxes on the level felt overly restrictive and in some cases even felt arbitrary—especially as you approach the bottom of the level. It'd be interesting to see how the game would play with these tightened up. It also seemed like the player moved slower when moving diagonally vs moving vertically/horizontally when playing with my game pad. Ultimately, I loved the concept and I thought the art was really fun—thanks for making and sharing your game!