capped enemy budget at wave 23
added error sound and red text when you can't afford a tower
added red and green text when losing and gaining lives respectively
fixed crash when using purity
fixed bug that took you to negative money
fixed achievement 'ultimate victor' not activating (doesn't backwards-check for achievements as this would make cheating super easy!)
whale hp: 24 -> 18
megaladon hp: 60 -> 30
steel fireworks
lvl 1: 2 -> 3 damage
lvl 2: 3.5 -> 4 damage
lvl 3: 5 -> 6 damage
lvl 4: 7.2 -> 9 damage
sludge gun
lvl 1: 0.2 -> 1 radioactive damage
lvl 2: 0.5 -> 2 radioactive damage
lvl 3: 0.8 -> 3 radioactive damage
lvl 4: 1 -> 4 radioactive damage
glass shard
lvl 2: 0.6 -> 0.7 damage
lvl 3: 0.8 -> 1.5 damage
lvl 4: 1 -> 3 damage