v0.7.2.4-alpha

Balance and bug fixes:
Coal now does no projectile damage, only explosion damage.
Bowler has been buffed some.
Removed collectible jumping. =\ I did this as it made the code much cleaner and extendable in the future. It also means that I don't have to cherry-pick what things the player can jump on, I made it so that the player can jump on anything that they can collide with and nothing else.
Fixed bowler to work much better, still janky but much better.
Fixed some bugs surrounding the transparency effect on collectibles and projectiles.