Nice concept, but try expanding on it a little, maybe a few examine infos on corpses and things to tell a little more of the story to players. Also, the numer lock could use a small redisign. Limit the amount of numbers you can enter, maybe by adding some [][][][][] in the display to show the max code is 5 long, and allow for entering numbers using the numpad too instead of only clicking. All in all, it could use some more length/story. 3/5
This should get you started.
Day one: do nothing - earn 17 - buy acceleration 1
Day two: try to bounce twice by steering forward a bit - earn 50 - buy glider 1
Day three: hold left the entire run - height achievement - buy ramp height 3
Day 4: go the 5' slope, GET THE 5 SECOND GLIDE ACHIEVEMENT OR RESTART - buy acceleration 3
Day 5: 5' slope - fly as far as you can, earn the speed achievement
While just starting out, I am kind of confused about these little signs on my heroes stating their element, I've never seen them before and there is no text to accompany them, so it's hard to select the right unites before you get to know them.
Finally made it, 1.2k on day one, bought radar 2 and 1 emergency rocket and 1 fuel sucker I think. Then 4k on day 2, bought fuel sucker 4, fuel tank 6 or something, and both left+right rockets also around level 6. Then just hope it all comes together :)
 "no-one has to die."){kind=icon}
 "Monster Coming"){kind=icon}
 "Learn to Fly"){kind=icon}
 "Guy of My Dreams"){kind=icon}
 "King's Guard"){kind=icon}
 "Flight"){kind=icon}
 "Griswold the Goblin"){kind=icon}
 "Solipskier"){kind=icon}
 "Protector IV"){kind=icon}
 "Gibbets 2"){kind=icon}
 "Defend your Honor!"){kind=icon}
 "Clockwords: Prelude"){kind=icon}
 "Frontier"){kind=icon}
 "CycloManiacs"){kind=icon}
 "Pinch Hitter 2"){kind=icon}
 "Pandemic: American Swine"){kind=icon}
 "MoneySeize"){kind=icon}
 "Hedgehog Launch 2"){kind=icon}