This game is very cute and has an interesting story / level progression for being a smaller game. The pixel art is clean and well done. I would suggest more details to the background because I want to see more of this pixel art style but either way the level designs are very good. Most platformers tend to keep the same look or style for the different levels but I like how it changes to the astronaut using a parachute to fall. I would suggest adjusting the camera's position so that the player is more centered, but other than that this is very nice work!