That's good that you have experience making games, I have a couple of criticisms and I'm leaving out art because I know art is hard even for me. I know that you're game is in the early stages and it's a great time to add things. I think you should add;
- Sound effects
- Harder Progression (Game get's harder the further you go i.e. faster/more obstacles)
- Maybe a shop if you can
- Character Selection
Like I said I know the you're game is in the starting stage's now, my advice is to get the core mechanics down first then start adding extra little things and polish the game. I don't have any criticisms as the game is in it's early stages but I would love to be updated some time soon, good work keep at it!