The positive: What a weird and wonderful concept! The hamster is adorable. The music is fun and I like how it builds in intensity as the game speeds up. The controls are simple and easy to grasp. I also like that you can use whatever controls you're most comfortable with as a gamer (option to use the mouse or the keyboard and option to use w or space for jumping). The animation of the hamster jumping and gliding was pretty satisfying. The infrastructure to add high scores and play against other people online is perfect to give the game a sense of purpose since at heart it's just an arcade game.
The negative: This game is rage fuel. Even the first obstacle is hard to get over as a new player. There could be a bit more variation in the obstacles (they were all the same size and shape and color, just stacked and lined up in different ways). There could be more colors and things going on over all - perhaps some power ups, different skins to choose from for your hamster, and maybe some variation in the background as you travel through space. It also would've been nice if the leaderboard was actually live and if your scores showed on that leaderboard. Sadly those features weren't working at least for me.
Over all: I liked this one. It was cute, retro, and engaging. It doesn't feel polished yet but it's a good concept to finish developing.