A solid execution of a concept you don't see taken advantage of much in most 2D games - terrain-based mechanic changes for both player and enemy. I really enjoyed the visual style of the game and I feel it could serve as a foundation for numerous interesting enemies and mechanics. I like high difficulty, so the pace was a bit slow for me, but the enemies spawning on top of me during the final wave caught me off guard! Well done. Would enjoy seeing more!