It's good, but it needs work.
I have a few suggestions;
1) The experience should be totaled up instantly when you hit the ground. People run out of fuel before they get the experience totaled even though they would have won.
2) It's too luck-relyant. The explosions and enemies dont relyably send you up. The height varys too much; one miner can send you all the way up while another only makes it halfway.
3) The enemies are also based too much on luck. You should make some variable where if enemies havent appeared in a certain length of time then they're forced to spawn.
4) The same goes for their drops. Not all of them will drop bombs before they leave the screen, ant this can ruin things.