Dude, i dont know if this problem is just in my end but when i click on the exe it says that the Blacklair_Data folder is missing, so maybe check it out just to be sure if there is no problem with the game.
A downloadable Black Lair
U -> ATTACK
SPACE -> JUMP
This is only a prototype that i made to test some ideas i' had.
So, dunno if i will continue to update the game.
Have fun =) !
Extract the .exe file and data.