For a first time game development with a group of people this is a good submission. My first jam with a group the game broke hours before submission!
I couldn't tell what my button presses were doing. There was no feedback visually or with audio or something else to tell me if the timing was right. Maybe just showing a ghost of the button press where the timing is supposed to be right would help a lot to communicate to the player what is going on.
Keep going!