Just fix the geography fails. Take a world map, and check. FYI, Buenos Aires is NOT on the atlantic coast, and, as a Brazilian myself, it's INCREDIBLY annoying to see such mistakes. Would you be happy if someone said Quebec is on Florida? Or Paris is Spain's capital?
NO, YOU WOULDN'T
I thought the game was too easy. There wasn't any challenge, apart from some of the middle levels, and that huge base. Could be made into a longer game.
For one of the best weapons in the game, just win act 19 with the very first weapon (you know, that gatling). At max weapon level and with odin (1.5 attack multiplier) you'll deal 850~950 damage per bullet (you shoot two at once). Not that hard, really.
not km/h. It's impossible to reach 300 km/h in a normal freeway (think: 1 mph = 1.6 km/h)
Put a normal speed unit, and also a "life" bar: a car that bumps into you while driving only a little faster does NOT cause an accident. However, a good game. 4/5
Also, the shield ships are way too maneuverable. I've seen a few doing 180º turns, making it a lot harder to beat them, thus making survival almost impossible.
This game wasn't as hard as I expected...
I finished it in my first try, in the hardest level (You're Nuts!), with 3 spare lives. And i lost the fourth because I thought the boss had died, but he didn't =S
If you do want to play games in this genre, try Touhou. It's easiest difficulty is far harder than the hardest here.