I really like this take with the mutations more a part of story rather then mechanical. The sfx are also good and the beating heart increasing as time went on made the game more immersive. The only thing that I think was unclear was what each of the abilities did. Like I figured out radiation shoots the laser and the target kills cells close to it, but I couldn't really tell what the other ones did and they kinda felt like they killed things at random.
All in all this game was done really well and was pretty fun.