I just beat the mid 1st boss and had the arrow to continue so pushed forward and died and had to restart level one, Also the screen of enemies before the boss if you press left too much that screen reloads with the enemies?
What are the things you collect?
Very buggy at the moment. Nice music though
Edit: Just played through level 1 & 2 (no end boss on level 2?) and takes me back to level 1, not sure the version of this is the most recent version?