Overall, it has a lot of potential to be way more fun, but it is okay rn. One of the things I liked was the background, and how it was a gradient and it looked like I was climbing all the way to space, although it's very simple it could be much more interesting. Maybe have blocks that kill you along the way, or items that are hard to get but give you something nice like a speed boost or an elevator for five seconds. Making some items or obstacles can make this really fun, as atop trying to beat your high score, you need to be skilled and use the movement (I also liked your movement for how slippery it is) to doge obstacles to get ahead.