This is a really interesting concept. I like the different abilities you get and forging your own path along the way. I had some issues with sliding down the platforms and at some point getting stuck in the gap between two platforms. Maybe decrease the slipperyness of the slopes a little bit. The one big downside for me was that you couldn't skip the opening cutscene (or at least I didn't find a way to do it). I found it a little long-winded the first time, already, and on the second try it was just tedious. I would have played this a lot more if you could just skip the dialogue and jump right in.
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See the comment below you. :D
Also, the game will eventually be "split" up into a fully fledged story mode with focus on the characters, exploration and save/resume playstyle and a dedicated speedrun mode with no dialogue and gimmicks, just pure and fast gameplay. If you liked it already, definitely stick around for that. :)
Thanks for playing.