Hey nice work. Nice straightforward, simple platformer. I liked the control you had over your character in the air. Some things I would note about the core mechanic was that because of the fact that your jump height increases with the more aliens you have, small jumps become really tedious. It seems like you have two levels of jump height, but I would have liked to have a bit more granularity. I also felt like the character moved very slowly with no acceleration, which while it allowed me to have more control over the character, felt a little sluggish game feel wise. With some background music, a bit more visual polish with some particle effects and stuff, and tighter, smoother character controls, you'd improve the game feel a lot. Good job!