У вашего броузера проблема в совместимости с HTML5
Farming the orc cave
9,500 EXP per orc
4 orcs=38,000 EXP
15-20 seconds per run
15 seconds x 4 = 1 minute
38,000 x 4 = 152,000 EXP
in 10 minutes 1,520,000
in 1 hour you will have 9,120,000 EXP
SPOILER