Try to find the exit and kill as many enemies as you can along the way. You can only hold one probe and one potion at a time. When opening a chest you can get more hp, more damage, a potion or a probe (the last two depending on if you already have one).
Use the arrow keys to move.
Use spacebar to attack enemies, open chests and to go into the exit.
Use ctrl to select which enemy you want to attack.
Use shift to launch a probe, this will allow you to see what is in the rooms around you.
Use p to drink a potion and increase your health.
This room will have enemies, but the fight will be easy.
This room will have enemies, but the fight will be of medium difficulty.
This room will have enemies and the fight will be hard.
This room will have a chest.
This room will have the exit.