This was such a blast to play! The music, the gameplay, and the art style all went together so well. Everything was pretty simplistic which made the concentration on the gameplay much better, and everything was colourful yet notable. The music was really hype and set the tone of the game immediately.
The gameplay was pretty fun and well thought out, the only thing I would suggest adding would be one or two more variety of weapons if you will ever work on this game in the future. It would add some sort of variety to the game and wouldn't feel too repetitive.
One other thing I found was that the mattress in one of the floors; if kicked on the door, it was hard to remove. Not that this is an issue, as one can simply restart the level, just thought you should know that.
Other than that, it was honestly an amazing game and it was so much fun to play. The ending was intriguing and would definitely love to see more! Great job and good luck!