Unirally is a very funny race game, the only downfall is your thumb is getting reale sore.
You have to do tricks in orger to accelerate, and you do the tricks by jumping+button+directional, a bit like tonyhawk. As it's side scrolling you can't realy look ahead and that brings another fun factor. You get also scores for your tricks and on top of that you got a couple of levels where it's all about score. You can race vs more uniracers or do time/score challanges.
Visual:
Simple, but less is often more especialy with this game. Colorfull and sharp realy fits the game and give you a indication of how fast your going.
Sound:
Forgive me realy can't remember i probably played it with rage against the machine or something.
Summery:
I once rented this game for a week and it realy got me hooked. Never rented it again but if i had bought it i would surely play it again. So if i'd see it in a bargain bin somewhere i get it for sure.