The title screen + intro look really good. They have a very high level of polish going on. The platforming feels great too. Jumps are responsive, wall jumps are nice and snappy, and overall it just feels good to control. Getting a jump controller to feel right is not easy, especially in a first jam, so props there.
I also really like the idea of picking one ability and committing to it. Dash, dbl jump, phase, and gravity shift is a cool spread. What impressed me most is that the levels still work pretty well no matter what you choose. That's not easy to design around.
Nice pixel visuals, good sound feedback, smooth feel overall. Amazing first jam entry for sure.