This game has some great ideas in it, and some nice responsive controls. I like the dash mechanic and how you can increase your jump height by dashing straight down as you hit the ground (kind of like the Ducktales Pogo stick), and while difficult (once I'd figured out the mechanics) not completly unfair.
However.
The game has done a really poor job of teaching the player any of the mechanics, and the difficulty curve is a vertical wall.
I'm not even saying the game was too hard, there is absolutely a place in the game for the challenges presented, but new players should be eased into them. (Plus, it's an easy way to make your game longer)
For example, you could extend the first room into 3 puzzles. One where you have to dash-bounce (without spikes) to get higher, one where you have to dash-bounce across spikes (but not vertically), and then, finally, the puzzle as presented.
Then there's the dream switching mechanic which wasn't mentioned at all in game. I had to go to the game page to find out Q and E did things (I downloaded the game from this page which has no description). Once you tag that purple star it should prompt you to press E to change dream level.
Navigation is also quite difficult as the playfield is very maze-like, with no direction indicators or hints towards your goal. Which wouldn't be so bad if, having completed a particularly hard section, you realise you've gone entirely the wrong way.
There's a lot of promise here, and I hope it gets continued love post-jam.