Damn, the london one looks amazing!
The leftmost cactus looks a little funky ... 
Are you sticking to the tile limit for this?
Thanks! Still need to add a thing that goes into the black space on the right.
Regarding tiles; I'm "using" the
MMC5 chip in this game, which gives single tile palette assignments and has a tile limit of 16,384 per screen (rather than 256). In real terms this means you can use a tileset of 1024x1024px instead of 128x128px - not that I'm using that many, the scene above is using half a tileset of 256x256px.
I'm flipping and rotating all over the place, which the NES couldn't do, but also I have to fake palette assignments so it's a trade off.
thinking of some ways to do a multicoloured title screen using tiles and the same NES restrictions...
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