... I think it's a bit slow, but with a few modifications you could make a nice 3-4/5... but so far... I don't like it... not my type of game... sry 2/5...
GREAT! The only thing i'm wondering about, is why the upgrades mostly are spikes? it's like you upgrade the tires, and then your rims gets spikes? Anyway, that's just me :) 5/5!
I think it's a bit frustatrating when you'll have to blow the entire bridge instead of the troopers. Especially when the bridge-design is more complicated... Anyway... Good idea mate!