Nice to hear this is you first game jam! Hope you're enjoying LD48.
As far as the game goes, considering you did this alone, its pretty neat! The music worked, the mechanics were there, and it made for a pretty simple but enjoyable experience. It was interesting playing an infinite-runner type game that went in a diagonal. The only "problem" I encountered during the experience was that sometimes the background dirt texture would jitter/reset at certain intervals.
Some recommendations:
- Maybe consider having the pixel art not be rotated all diagonally. Or if you do, stick with it. It kinda led to this, er, interesting transition at the start. transition.png - Consider other instruments to the music beyond just the piano. I mean, the piano was fine, and it worked for this game. I'm just saying for maybe the future. I really like [BeepBox](https://www.beepbox.co/) for making songs for games with, but you may already have a program you like. - Maybe include a score display at the end? Something like @teto was talking about.
But yeah, this was a really creative idea. A rain drop going *deeper and deeper* into a pipe. But heck, for a first jam game? This works. :)