I remember seeing this on the GMS2 discord so I decided to play it. The visuals look amazing. I love the atmosphere! It was relatively short but I see a lot of potential if you plan to make a post jam update. So now comes the feedback:
I think you had a typo on "Double A to Double jump" Did you mean W? Also double jump doesn't work with the space bar. The tutorial bombards the player with too much information. I think you should gradually introduce new mechanics as the player progresses. It's understandable why you crammed it in since there were only 2-3 maps but it felt very disappointing to learn how to play to game only to find it end too soon. I think the enemies have too much HP. 1-2 hits should be enough, especially for the beginning of the game. It's boring to sit there waiting for the enemy to shoot because I can't shoot my own projectiles. There should also be visuals or sound when I hit them. At first, I wasn't sure if I was hitting them or not.
Overall, I think you've built a great framework so I hope you continue to develop it and have your hard work pay off!