It's very difficult to give this game a "Yes" or a "No" vote, I'm a litte bit on the fence with this one.
There is very little in the way of tutorial. AKA They introduce a new enemy every so often. It's a fairly simple control scheme, anyways. you can use the arro keys to move. My HUD indicated that I had 3 lives, and 3 nukes, so I tested the space bar and it does an Area Damage attack - a nuke. sure. There are health pickups along the way. I was bout to give this a neg score, as you only get 3 nukes per level, and nuke is your only weapon. It's very difficult to get enemies to collide to kill each other. It took me until the 3rd boss to realise that some of those Health pickups aren't giving me any health... they are actually Nukes - there are two kinds of pickups. Because you 'can' replenish your weapon, I no longer feel it deserves that No vote.
It's a very fast paced game, and much of the time, until I discovered the replenshible weapon, at least, I felt I had very little control over what was going on - specifically, defending myself. The game mechanics are solid, the gameplay looks good, even if some of the story seems flimsy, it has a leaderboard, which I tend to do better on when I die, rather than complete a level, There is nothing "Wrong" with this game, so i can't give it a 'no' vote. is it worth the $1.99? well, for about an 1 1/2 hour of gameplay in story mode, considering that a movie is $18 for the same entertainment value, I say it's actually a good little buy.
Basically it's almost a little gem. It feels almost old school arcade, but with the twisting 3D mapped roadspace, bringing the feel up to date, rather than the 2D top-down road racer that this game really is.