Sisyphus

About the game
Sisyphus is a game inspired by the legend of Sisyphus that had to push an immense rock up a hill, only to watch it roll back down, and to repeat this action forever.
Read more about it here: http://en.wikipedia.org/wiki/Sisyphus.

How to play

Each big face of the rock has a letter on it. Pressing a corresponding letter pushes the rock up at that point.
You go faster if you press the letter that is at the bottom of the rock.
You can steer by pressing letters that are on the sides of the rock.
You can press only one letter at a time (I think I will allow two to keep more fingers busy).

Gameplay

The goal of the game is to get the rock at the top of the mountain as fast as possible.
The game tracks your best time and altitude.

TODO list

I would like to add more obstacles and dangers (traps, creatures?) that you have to avoid.
I would like to add something at the bottom that keeps going up to force you to move faster (I'm thinking lava).
Give the player a clear goal (reach the top or get new best height)
Improve the look (I have a nice lowpoly faceted style in mind).
For extra difficulty I could replace the letters with corresponding Greek leters
For extra difficulty I could also add different rock shapes that are harder to roll in a straight line.

Notes
This is an ALPHA version. I only spent a few hours on it.
It is short and I didn't put any though in the design of the level (I just made a ground plane and added some noise to it). So the difficuly doesn't make sense yet. It's not too hard but there's a section at the top that is hard to go over. Obviously a finished version of the game will have a nice flow that starts easy and gets harder.
For the design of the levels I think I have two options:

Fixed height (you have to reach the top as fast as possible)
Infinite climb (I can randomly add top sections and make the player go as far as he can, other things will end the game)

I'm not yet sure what I will pick. I guess I will try both and see what makes me more motivated to play the game.

I'd love to hear any feedback you might have.

Thanks,

Andrei