When I start on a new level in Blocky Man, the first thing I have to do is decide on the horizontal and vertical size of the level. That involves me guessing how much space I'll actually use. My estimates are usually grossly incorrect and lead to me having too much or not enough space. Luckily, I made a good guess with this level and alotted enough space so I could play around alot with the level design.
When I retool the level editor for use by the player, I'll probably just make all custom maps 1000x500 tiles, which is far bigger than any of the main game levels. Honestly, I'd have trouble making a level that big, so it's more than enough space.
Well, I'll probably finish designing the level tomorrow, which means I can't put off programming the boss anymore. In any case, I'm pretty close to finishing the last Blocky Man level, and then it's on to...everything else I need to do to finish the game![grin]