I'm really enjoying this! Love how minimal it is, and yet everything in it is done very well. Movement, camera, the dash, and using the charged shot feel great. Unfortunately I ran into an issue: While talking to the spirit in the third area, it stopped recogizing the mouse and I couldn't click on the dialog box arrow to continue. I couldn't figure out how to exit the dialog window, so I quit and relaunched and unfortunately it didn't keep my checkpoint.
I plan on returning to it shortly, just wanted to report my problem. (Sorry if this is not the place for bug reports.)