I love the little metal footstep sounds the player makes! Too bad I didn't hear it much because I kept on jumping (thinking it'll make me faster), also love the music loop (even though it's a bit too short), and the frantic gameplay once I got the hang of it. I don't get why the jump is there, because their are no obstacles to jump over and I don't think it makes you go faster (and if it does, why not just add a sprint button? Or make the player move that speed by default since they'll always be moving their fastest everywhere anyway). I couldn't tell if each playthrough had a different lab, but if they didn't a post-jam version could try experimenting with that along with obstacles to jump over too.
When I first started playing this game I thought it'll be endless, I was surprised to see that it would end when I saw my first green reactor not ask for any more mixtures. To increase replay value you can have an endless mode that can either time how long you can survive in a single lab, or can see how many labs you can complete (complementing randomly generating labs, after you turn all the reactors green in one lab in this endless mode you gain a point and move on to another random one!)