This game was super short, but great for a first jam entry, you should be pleased!
You have good gameplay instincts and its a shame it was over so fast! for some constructive feedback - In the future I'd make the dangers or falling shapes a little bit easier to read (see coming) It felt a little bit too luck based as to whether or not I'd get hit (sometimes). I had a few issues with the audio, where the song would rapidly start or freeze up multiple times at once and glitch out (probably look into that). I recommend using a colour palette in the future for pixel art, it helps everything look / maintain consistency, its easier on the eyes and looks more professional - try Palette List (Lospec) for that.
All in all I had fun with this, keep making games and sharing them :)