Level Select:
Start the game with the QUEST:ELD< difficulty 1-5> command line parameter.
Cheat Mode:
To enable cheat mode hold Caps Lock + D + X + Arrow Down. Press Backspace, then type one of the codes below to activate it's cheat function.
Function - Code
Power-up weapons, both characters - fire
Full health - rain
Power-up stamina, both characters - magma
Round mana gems up to 250 - astral
Enable fire, rain, magma, astral codes - prime
Level select - ether
Invincible, except for spikes, weights, drowning - wind