You have such a nice style to your game! I love the fast movement. I usually don't like it when puzzle games have slow movement, so this felt nice. I also loved the (shoot down = double jump) kind of mechanic.
Though..
- You can skip through most of the levels because you have a lot of hearts and invulnerable frames.
- I wish when you held down jump, you could jump higher. Sometimes the jump was hard to control.
This is such a nice game! I really enjoyed playing through this.
(BTW, if it's made with GMS, why not allow resizing? It took me a while to figure out Alt+Enter makes the game fullscreen, along with other controls.)