The API for perfect jump streak only submits the current active streak when you die. You may want to create a variable that stores the max perfect jump streak during the current ride, and submits that when you die.
You should probably add API that reports the number of Stars you've earned. Also, it would be nice if the score system remember you best score on each level, and that the total score was the sum of individual best scores (so you can't inflate your score by repeating levels multiple times.)
I can't rate this higher than 3. It's a viable strategy to not play the game (you'll pass a level roughly 50% of the time if you do that and it's fairly difficult to die) and that means that there aren't very many interesting strategies.
If you are going to put fifty shift+a jumps in the game, the least you can do is let us macro shift+a to q or something.
Also, put a save point on the bottom of room 20 in beginner. It's obviously useful.
You need only about $5000 to make it to Mars: the key is full radar + full fuel sucker plus some money in fuel tank and launcher upgrades; then use the radar to turn the game into a platformer and gradually climb your way up to Mars.
The solver doesn't seem to recognize apostrophe's. Also the dictionary is probably too big: one round I got a set of letters in which the only valid word was "holard", which isn't in my home dictionary.
Some thoughts:
1. The game is a bit too easy. At the very least make the challenge ramp up a bit quicker.
2. The major source of lag is from the particles from opponents dying. Either clean this up or offer a way to disable violent death.