This game could use a bit of polish - there are a couple of bugs (e.g. the new stuff notifications that keep popping up, sometimes instead of winning the level you get the save screen) that are annoying, also the bosses could use a warning about the time limit.
Otherwise, I'm not entirely sure what's with the mummy mode, but the rest seems pretty good.
Weird bug that broke everything when I got to the point where I could hit 500mph on take-off. Unless that freezing the screen and letting the rocket carry on is a 'feature'...
I was enjoying this game up until I got to the northwest area and realised I'd have to grind for about 2 hours to get enough reputation for even one of the factions to consider me an ally. I don't suppose a further tweak to the mission rep gains would be in order?
Kinda fun, though I'd leave out the levels with the invisible platforms - as Scottthespy says, they're kind of annoying, and especially so when you're not given any previous hint that the things exist.