Really cool prototype given how quickly you made it.
Some initial things that need to be addressed though are as follows:
-Sometimes, left/right movement will lift your character slightly off the ground, making Jumps feel weird.
-Obstacles and speed start very fast. I think it would be more fun to have a simple start, that gradually adds difficulty.
-Since there are platform gaps so often, the player should be able to control how high they jump by tapping vs. holding the space bar.
-Robot obstacles with their arms out make for some strange hitboxes.