v0.4.0.0

Been a long while since the last update! Changes:

• Variable level sizes are now supported! you can change the level's size on the "Level" tab, and you can scroll around on the editor with the middle mouse button. If you don't have a middle mouse button, you can also use ctrl+click, but currently that still places stuff around...
  Another problem is that if you shrink the level, some things can end up outside the level boundaries. These things will still be present when you test the level, but will be deleted if you save and reload the level.

• The way to choose the color of doors, locks and keys has been revamped. I think the new method should make it far easier to recolor things.

• You can now fullscreen the editor with F4.
• I'm temporarily removing the copy-pasting images feature. I'll try to get it back soon...

Bugfixes:

• Fixed keypad locking the editor up if you held A while playing the level and pressed F5.
• Fixed blast locks still secretly requiring their "key requirement" as if they were normal locks.
• Fixed the text caret being reset to the left whenever you typed in the level name and author fields.

Finally, some "meta" stuff:

• I've started using Itch's "butler" tool to upload builds. This makes things a bit less messy on my end, and as a fun side effect, it allows you to download previous versions of the editor if you use Itch's app. Not that there's any good reason to do that, though.
• Using that tool, I added a button in the game engine to instantly export the game and update it on itch.io. You might've noticed a sneaky 0.3.0.3 update. That was pushed automatically while I tested that button. Oops.
• Also using that tool, I added a much better system for checking if there's any updates. Previously, it literally went to the editor's itch page and checked the "The current version is X.X.X.X" text, which is a pretty terrible way to check for updates.