Cool game, like it very much! I have a few tips: For the graphics the effect look really cool but they could be a bit less intense, I think that would look better with more subtle grain. The double jump concept was a bit janky and I think that you should introduce those concepts in a more save environment and then test the player. Right now I got already a bit stuck on level 3 :/ But overall great job with your first game! I also made my first game this jam and had a similar concept haha :)