Really nice game! The controls were very confusing at first, luckily I could change them in the options :P The playloop was really nice. Especially because the pattern is always the same, you can start to learn it and really get better each time you play. That felt great!
What I did not like as much is that sometimes you had to use your dash to get through a row of projectiles. To me it would feel a bit more fair if there is always a way to avoid them if you chose a different path before (but maybe that is just me!). I also did not fully understand why the dash sphere disappeared. I now saw you explained it in the comment below, but an in-game explanation somehow would be nice I think.
But all-in-all I really liked it! It is very addictive and just fun to play. Good job!