Hey, sweet novel mechanic and nice minimal presentation, I liked that a lot!
I wish there was no time limit, but some other objective so I could play longer - I had real fun learning how to effectively use my tail.
I think I'd prefer a goal to destroy all enemies or e.g. get some sweet combos going (destroy x enemies at the same time or some other things to spice it up) - the timer stresses me out a lot :D
Sweet entry!