robmaister: the thing that was killing you near the second checkpoint are the spikes on the ground, and i am aware of the buggy spawn, i'm afraid that's mostly a problem with the way checkpoints and the view recentering is handled, blocks outside the view are inactive, so as soon as the player is outside the view, blocks will be non-solid, also, when a lagspike occurs, the player might fall through the ground because the game doesn't check for collisions between 2 frames, and uses a time multiplier to determine the distance traveled between 2 frames... i haven't made the game reset its timers properly when loading a new map, and that causes the "falling through the ground" effect that's happening
the scrolling away at high speed means you spawn in a wall, which is indeed badly broken, sadly, the game tries to move the player up to a place where there's no blocks overlapping it, and does so at 10 pixels per frame, it also does about 5% damage per frame...
as far as brown blocks goes, that's actually your breaking the game, if you check at the bottom-left of those blocks, you'll see a small hole you're supposed to fill with any of the blocks in slots 1-6 of your inventory, while the border around slot 9 is blue(IE the editor is turned off)