I think some UI improvements could go along way here. 1) being healthbars know how much health something had when shooting it would allow player experience better. Otherwise I felt i was shooting into nothingness with no impact. I think the tilemap looked good overall. Adding some idle animation to player could help and avoiding the hard black outline as it didnt match the tileset too. Adjusting the collisions between the player and the enemies help with a weird clipping bug I got as well. I did like the upgrades and tooltip that was a nice QoL. I think the returning was well done. I think finding or improving the artstyle could go along way with the bones it has. Maybe cool ability to summon little robots to help with those damnflyers.