An impressive entry for only having one month of experience! I think it was great how you were able to fit top-down, side-scrolling and shooter gameplay into it; each of them had fun elements!
A few tips, mostly to do with the platforming. It felt very slippery to control, kind of like ice physics (both with and without running). I think the big thing is that the speed should increase/decrease at a faster rate. That way, it's easier to judge where each jump will land. Also, the pixel art assets were sometimes in noticeably different resolutions, making them sometimes feel out of place.
Still, this game had a lot of charm, with a wacky sense of adventure. I hope to see more stuff in the future. Keep at it!