Good mechanics, a nice minimalistic spin on infinite runners. Every time the mutation occurred I'd die because there wasn't enough time to understand what the rules were of what I'd just changed into, sometimes I'd die instantly from a jump I initiated before the change. That said I ended up memorizing the sequence just so I could get farther.
Perhaps give some kind of warning as to what mechanic is coming next, maybe slow down gameplay for dramatic effect but also to give players enough time to adapt to the new controls?