This game has a polished, fast-paced presentation and felt good to play. I really appreciated the graphics, built-in tutorial at the start, and the pretty solid use of the limitation of score advancing through the levels.
I think the difficulty curve was a little too high for me personally. I got to score 13 and then couldn't manage to jump between the lava on the floor and ceiling. A dash mechanic would allow such designs more easily, but I understand not wanting to play too much into existing platformer tropes. Either way, great job for a one person team!