Gameplay-wise - it's a new Celeste! Great game, great mechanics, great level design!
For future develpment - for sure audio, but also to add some personality to our dwarf.
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Celeste was definitely one of the games we had in mind when designing the game (a difficult junglegym of a screen where you only have one shot to get through it) so that is one of the best compliments you could have given us. Giving Urist some personality would have been nice, I'm sure they could have a lot going on personality-wise. Probably couldn't make them as well fleshed out as Madeline, but one can dream.