Tip: If you place too many sprites on the same screen, it will slow the game down. You can use the SA-1 Pack to reduce this slowdown, allowing more sprites on screen if required.
I have no breakdown but I'm sure you can hover over the blocks to see what they do. Just drag the .dsc file to the same folder as the ROM.
You can find dotted blocks reskinned as solid for sprites, spotlight blocks reskinned as solid for Mario, and so on.
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