I suck at platformers so, I got stick and cloudn't move past a few platforms haha.
It took me a few deaths to figure figure out that you had to hold shift/run to jump higher
I liked the dash/jump concept, with the rising lava forcing me to play faster driving the pace.
I think it would be smoother and more enjoyable in the future if you just make running the default state, the base jump is way to small so just holding shift constantly, also makes your controls more intueative, logically I thought there was a way to jump higher so I figured it out but that would prevent people from playing your game need the dark souls, league, dota 2, style easy controls and concept to play hard to master.
You could also start off with smaller jumps and increase the difficulty of the map as well. single jump to hit this spot, oh now I need a double jump and then sprint jump and dash jump etc.
granted the time constraints, just ideas to think about for the future.