I like the visuals and the concept of trying to escape rising lava (which, thankfully, isn't rising too fast), but I think you really needed to restrict which keys are selected for the movement. Not all keyboards are designed the same, so when I had to move with the right CTRL, I couldn't because my laptop doesn't have one! My F keys are also used for adjusting audio, brightness, and other functions, so when I had to use F keys to move the game wouldn't register my movements but my settings were going haywire. Sometimes I had difficulty telling what keys were being displayed. For instance, when I had to press on the down key to jump, the prompt definitely did not say "down key". When that happened I'd just run my fingers across all the keys until something registered, and sometimes nothing registered.
Aaaand now that I'm reading the comments it seems like everyone has made these comments already. Sorry to be redundant! Looking at the game images it looks like this map is enormous! So it's too bad I wasn't able to experience the full thing.