Nice game for a simple device. I have the same display so I thought I would give it try. I am running it on a Mega.
In the routine drawRock, there is a reference to "bitmap" and it gives an error. It needs to be removed, i
The line is
It should read, (get rid of the "[bitmap]"
I also had to add the following at the top of the program
void drawRock(char entity);
boolean collision(char entity);
void explosionAnim(char xPos, char yPos);