With the first room and Frisk's sprite-sheet done, all I have left to do before a playable demo is released is:

• Toriel sprite-sheet

• Flowey sprite-sheet

• Napstablook sprite-sheet

• Ruined Home tile-set

• All the Ruined Home rooms

• Dialogue & cutscenes

• Battle system

• All the Ruined Home encounter sprites

• Panic about how much stuff is left to do

• Stop panicking

• Realise I don't like half of what I've done

• Restart

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And when that's all done, you'll have a playable demo to play.

(I should probably get working on this huh.)