Patch 0.2.1

Changes:

• Added skins
• Added spikes
• Added 3 new levels
• Fixed time not recording correctly
• Removed leaf counter in level select as it was no longer used in V0.2.0

Custom Levels:

• Fixed new custom level size input
• Removed part editing button, this is now default when no other edit modes are selected
• Removed rope setting "Connect" (o) due to not being implemented yet
• Fixed grid editing not working correctly at larger scale (block not getting placed at mouse position)
• Improved grid editing