Better obj_ground, room change

Added more ground sprite variants, including a totally black one. Added
sphere shaped ground object in room1, for easily detection of faults in
the ground codes. Still need some more variants for perfect smoothness.
Added obj_brick

Added basic obj_brick, also player can now barely fit in a 1x1 height.
(top of head having no collision)
Also put some bricks in room1
Added death

Made so that when player dies, wait 2 seconds then respawn. The fading
black fades slower, and fades back when respawning.