v0.4 Update - New Level Types!

Patch notes for v0.4 update:

New level types!

• Putt levels: write a string that matches one regex but not the other!
• Edit levels: fix a broken regex with as few changes as possible!

Added new levels!

• There are now about 50 levels, with many more to come!

Bugfixes

• Fixed an issue where strings would appear behind the background

Known bugs

• The graphics and ball physics are a bit bad right now, but I’m coordinating with an artist to get something better