Writing this after getting to the part near the beginning where you have to push the blue speech bubble into the red one so you can push it upwards through the gap and jump on it to proceed. Took a break because I got a bit frustrated with the mechanics and pacing.
Firstly, there are some really clever platform mechanics here :)! Don't wanna spoil anything for people reading comments, but I really liked the puzzle nature of the platforming. It also has that signature Angela He hand-drawn art and melancholic atmosphere down. I like games that get into more emotional or serious topics, and so I like the idea of a puzzle platformer with some measure of "feels".
The Dash mechanic seems really finicky, unfortunately, and I really struggled to pull it off consistently. Not sure if it's the game or me :p. I also wish there could've been a Thomas Was Alone/Lost Vikings mechanic where you switched between controlling the various characters, or they had some agency of their own. Then again, solving puzzles on your own works fine, too :).
Having said all this, though, I did really enjoy this and I'll give it another shot when the full version is done :)! Good submission!