No gravity flipping as yet, I may add it as a power up (along with other elements such as speed boost, health, whatever else I can think of) but what you saw was my character sticking to the ceiling.

@Builderboy, Saintrunner - you're going to have a certain amount of "ammo", like you can only place a certain number of blocks in a given level to solve a puzzle. E.G. use 5 toggle blocks to get to the exit (or whatever)

Thanks for the input, COdeH4cker, I'll speed it up a little bit.

@parser padwan - The one I showed you in school the other day was an unreleased demo with similar (but monochrome) graphics. I'm definitely using the game mechanic you saw in there as well. Also, YAZP stands for Yet Another Zedd Platformer (subject to change)

Coming up next - scrolling backgrounds! I'll probably be able to post a screenie later today. The gray actually doesn't look too bad on the scrolling as of yet.

That looks epic, leafy!  I love how it looks like four level in spots even though it's three, because the mind is tricked to think the black/gray blocks are darker than the gray/white ones.

you SNEAKY boy! haha that's impressive.

yes, but you'll want to make a copy of your map data and modify that, so you don't screw up your map for permanent.

To acces the Yth element down and the Xth element across, go like this:

{Y*WIDTH_OF_MAP + X + START_OF_MAP_DATA}

So, to move a tile to the left, say:

{Y*WIDTH_OF_MAP + X + START_OF_MAP_DATA}->{Y*WIDTH_OF_MAP + X-1 + START_OF_MAP_DATA}

And so on

Okay, a simple way to do collision detection in a top-down sort of game, like what I used in Base 671, is to assign the current position variables and offsets for the tilemap into other variables, so you have a copy of how everything is displayed. Then, check to see if the character is inside a tile. If they are, restore the copy of the position variables so everything is back to normal! Note that this works best if your character is represented by a single point.

@parser - you said you were using *256 inflation? Make sure you do If sub(GET,X+(7*256),Y+(7*256))=2. Otherwise, I think your code is fine.

*BUMP

Finished! Screenie uploaded, download available later.

very cool, my friend.

I would do up, up-left and up-right. also, left/right/down might be good for some puzzles, mostly those that deal with exact and really fast timing of avoiding certain moving enemies or something like that.