I enjoyed this. It does wears its Celeste inspiration in its sleeve, but in a good way.
I however have a couple suggestion for the future.
1- make pressing the confirmation key show the full text, THEN a press with the full text on-screen progresses. I ended up accidentally skipping dialogue many times because of this. Also, a way to skip the story when replaying the level would be nice too.
2- rework your keyboard controls. yes, you advised to use a controller, but even so.
If I may make a suggestion, you set either spacebar or enter to be progressing the text. make it be Jump too. and set grip to Ctrl, Shift or another key that gives most keyboard a space between them and the jump so we can more comfortably switch between them. Dash, I don't have a valid suggestion, sorry.