Nice, nice. Has the perfect length and difficulty for a quick and enjoyable play-through. It felt a bit random where a portal takes you at times. (Maybe cause it is random? :D) I like that the portals were broken and glitched - that made the game more interesting and unique for sure. Maybe they could have been broken in a more predictable way e.g. by varying their target location in a predictable pattern or by showing the teleport connections even before jumping into a portal. The connections already offer great feedback by the way. That was a nice idea for sure. :D
Overall very enjoyable! Well done. :)