I didn't manage to lauch the game with the itch app but when i downloaded it directly and ran the exe, it worked.
I managed to finishe the game !
For those who are stuck, you have to make the skulls guys reach the door. On the first level, you have to use the arrows or A / D to see the rest of the level. Also to place spike traps, need need to first place it and then activate it with right clic.
Once you figure all that, the levels are actually not bad !
Good job on making this game !