Hi, so since this is your first game I'll give some advice for your future projects so you can improve, so if you ever make a game like this again, try to make the gun be seperate from the player movement, so you don't have to move a bit towards the enemy to show em, if you want a good example you can look at the binding of Issac, also sound effects would really make the game feel better, there are many sites where you can grab and edit sound effects, and some info on what the upgrades do and how much they cost would make it way less confusing. If you continue your game dev journy you can reach a point where you can make good games, I hope you don't give up, and improve.