I liked this game! It was pretty fun and I liked your concept with the portals. The music was really good as well as the sfx. Others have already mentioned the UI bug so no need to bring it up again. I do think some type of health bar and some visual feedback would be helpful to the player so they know when they're hit. The controls were also a little "slippery" feeling, the player moved incredibly fast and built up momentum pretty quickly. Toning that down a bit might give the player a better sense of control. Overall though fun little game and great effort!