Want some "advanced" techniques?
Try these:

Snaking:
The physics in BBS2 are bizarre, so use them to your advantage. If you're daring, find yourself a nice pillar or hill, and jump out and back in. You have almost complete air control, so you can lure bombs into a death pit, only to safely return to your temporarily invincible camping spot.

Death Pits:
In BBS2, the best and arguably fastest way to win is by managing a little death pit. Run back and forth in the same area, and be sure to jump right as bombs explode to stay alive. Once you have a nice death pit, there's no escape, so dodge and weave to either dig a way back up to "snake", or keep digging down to victory!

Bomb Leaping:
If you're skilled enough, you can jump on top of death bombs to avoid their deadly explosion radius! Just be careful…

Burning:
Remember, the key to using the fire powerup to your advantage is to use it to get more powerups. Dig to the closest powreup, and don't stop, because the fire won't last forever.

Chaining Explosion:
You've got a few seconds before your explosives go, so try to move towards other powerups before you explode! Just try not to jump, or you might waste your perfect powerup clump.

Li'L Mousing:
Don't ask how this name came to be, but just be aware that your mass is about the same as the other bombs (except for death bombs). So feel free to push them out of the way! It can help you with your camping and/or death pit.