I CAN'T GET PAST LEVEL 4, but besides that I like the concept. It would be cool if the rockets on the horse were visualized! 

I got to the final level. All in all it was quirky and fun but too slippery to ever have a handle on it. I mainly went for luck and restarting over and over 

Game is chill and was pretty fun to get through. It was however a little hard to sync up with my brain what key didwhat, I read that there is thrusters for the keys, it would be nice if that was animated to make it easier to see how the forces are getting applied Also getting the horse stuck inside of a wall was a tad rough on the gamplay.  I hope if you do decide to add more mechanics, to play more around with the physics specifically with magnets, the space bar moving the head would do wonders with some puzzles with gravitational pull!

so that's how those poor robot dogs horses at Boston Dynamics must feel...
I admit I haven't finished it because at some point the game seemingly reloaded itself, but it's pretty fun and could make a great rage game with some polish!