I love the art/animations and I love where this is going overall. The transitions between shifting reality and the puzzles around that is neat. The lore seems like it could get pretty deep too, very well done by the writer.
I had two issues when I played it. The first, I did a reality shift right when I transitioned screens, and I teleported behind the door and got stuck. I could shift again, but my character was just kinda stuck behind the "door" to the next screen and I went every direction in both realities and couldn't go anywhere and got softlocked and had to restart.
Second issue, the first screen where the skeletons show up, I got stuck behind a log in the lower left and got softlocked again. I tried around 5 minutes to get out and couldn't by dashing or moving any direction.
Last minor issue, I brought up the shop right when the game talked about shifting realities with C right at the beginning and I missed that dialog completely. I didn't realize I could shift until I didn't know what I was suppose to be doing and saw the controls below the game window. This can be fixed easily though, so I wouldn't call this a big issue by any means.
Don't take my 2 paragraphs of the softlock issues the wrong way! This is the beginning of a great game and would like to see it continue. Well done and keep going! You guys are doing great! You're off to an amazing start.