Hi!
I was one of the developers of the game.
Truth is, there should have been a keyboard control in the original version of the game. However, you must understand we were on a time trial, as this game was our last year project. We just didn't had the time to implement a good keyboard control.
I hope you enjoyed the game nonetheless!
I was able to play the game two years later with a new joystick haha and the truth is that the game is spectacular. Maybe the ending doesn't convince me so much. Are there different endings? Are you still united as a group developing other videogames? Because I would like to see your future projects.