I'm one of the developer of this game and i thank you for playing, rating and give your opinion about the game.
The holes aren't show by choice, in this game you need to try, die and by looking your previous footsteps going further and further while following your dad's footsteps. On your way you can find some barrels that you can move while pressing shift and try to guess where holes are.
(sorry if my english was not that good but i tried to at least make my text understandable)