Tiny loop refactor in LevelSystem#init

Might be slightly more straightforward... or you could just hardcode the array:

[10, 20, 30, 40, 50, 70, 90, 110, 130, 150, 180, 210, 240, 270, 300, 340, 380, 420, 460, 500, 550, 600, 650, 700, 750, 810, 870, 930, 990, 1050, 1120, 1190, 1260, 1330, 1400, 1480, 1560, 1640, 1720, 1800, 1890, 1980, 2070, 2160, 2250, 2350, 2450, 2550, 2650, 2750, 2860, 2970, 3080, 3190, 3300, 3420, 3540, 3660, 3780, 3900, 4030, 4160, 4290, 4420, 4550, 4690, 4830, 4970, 5110, 5250, 5400, 5550, 5700, 5850, 6000, 6160, 6320, 6480, 6640, 6800, 6970, 7140, 7310, 7480, 7650, 7830, 8010, 8190, 8370, 8550, 8740, 8930, 9120, 9310, 9500, 9700, 9900, 10100, 10300, 10500, 10710, 10920, 11130, 11340, 11550, 11770, 11990, 12210, 12430, 12650, 12880, 13110, 13340, 13570, 13800, 14040, 14280, 14520, 14760, 15000, 15250, 15500, 15750, 16000, 16250, 16510, 16770, 17030, 17290, 17550, 17820, 18090, 18360, 18630, 18900, 19180, 19460, 19740, 20020, 20300, 20590, 20880, 21170, 21460, 21750, 22050, 22350, 22650, 22950, 23250, 23560, 23870, 24180, 24490, 24800, 25120, 25440, 25760, 26080, 26400, 26730, 27060, 27390, 27720, 28050, 28390, 28730, 29070, 29410, 29750, 30100, 30450, 30800, 31150, 31500, 31860, 32220, 32580, 32940, 33300, 33670, 34040, 34410, 34780, 35150, 35530, 35910, 36290, 36670, 37050, 37440, 37830, 38220, 38610, 39000, 39400, 39800, 40200, 40600, 41000]