One of the things that caught my attention is that there is no bullet objects/particles appearing when shooting. Thought that's interesting, it's like in id software early games. And the graphics are very good, one of the best I've seen in this jam. Except for the font of some text, I couldn't read the text above where you type something and the labels in the shop. Enemies are difficult to beat, couldn't pass the second level. With tweaking the collisions and the enemy health, I think you can get an outstanding game. Good job!