TSOD doesn't use that many tiles at all, only around 350 at most. I instead use bigger sprites when needed. Because the mapper can draw invisible sprites, this isn't a problem...so I may actually have 1 sprite on the whole screen. Because collision detection is a binary system...that is a 0 or a 1...I can create beautiful maps with only 10 sprites on the screen and not have to conpensate. My mapper is intellegent
My collion detection is a cheating bastard that looks smart but really isn't.
Wow 1000 sprites. I could construct an entire universe with 1000 sprites.
Another reason why you guys have so many sprites is probably because you use 8x8 or 16x16 sprites.
I use 20x20 sprites...but the resoultion on the 89 looks much finner so the sprites are much sharper.