I already said this about another game but I like how you used something other than Unity. It seems like a lot of us are Unity devs so it's nice to play games made in different engines sometimes.
The game definitely has it's issues but it's overall a cool game that actually has a win state so good on you for that.
Here are a few things I think could be improved though:
1. The tileset could definitely use some work or maybe just make the different sections closer together because it can sometimes look weird walking down a hallway where everything looks the same.
and
2. Feedback. This is one of the rating categories because I think feedback it extremely important in games. Obviously you can't always include everything in jam games but it's nice to try to add a little bit of feedback to help the player out. At the end when you have to beat the boss and collect the blue coin to win I was getting no feedback and wasn't sure if I could actually damage the boss or if I had to avoid him and try to get to the coin. After a couple of deaths trying to jump over the enemy I decided to just keep trying to shoot him and it eventually worked and I was able to win. Even just making the enemy flash red slightly would help a lot with understanding whether or not the enemy can be damaged. You can also add sound effects to improve on the feedback but as I said, I understand that not everything can be included in jam games.
Overall definitely a cool game and I hope you continue to compete in future jams. Btw, did you do all the art yourself or did you find it online?