Great game! Your idea was really unique as I couldn't have imagined a game like this one. The visuals are simple but effective and the sounds match perfectly with the game. Try adding more types of obstacles and twisting more the ones that already exist. Try to surprise the player more.
The way you used the limitation was good as it accomplishes what it was asked for, but I think is something natural, like just one "action" button instead of two actual different actions. Sorry if I'm not good at explaining myself, please tell me if I wasn't clear.
I think your game has really cool aspects, so keep trying with different mechanics and ideas, good job!