I had fun playing this. It started to get particularly fun about 3 minutes in. Think about your game jam audience. They want to get into the action really quickly so you could set the difficulty to be more challenging from the start. Also some quick wins from a visual stand point would be giving different colours to the player and the obstacles and the floor.

I cannot rate it correctly because you know why :) But i'm sure your learned a lot in this jam and you have something in your hands you can build great ! 

Keep training, keep learning and keep the spirit ;)

That's a nice game, I don't mind the environment, I quickly want to survive as much as possible. The shadows are a really nice touch. I just really would have appreciated a background music to keep me entertained while dodging ;)

Short jams teach us our limits, you managed to submit a game, even though very simple it is here. See that as a great accomplishment on its own, good job!

sounds like you learned a lot about scope so don't worry too much about not achieving Subway Surfers at Home!