Infinity mode and other changes

Hello!

A lot has changed since the first launch:

1. The game can now be played indefinitely—let me know in the comments how many waves you survived!
2. Two boss battles have been added (wave 10 and wave 13).
3. Lights and shadows have been introduced to the map.
4. The day cycle has been adjusted to evening.
5. Plenty of bugs have been fixed.

Give it a try and share your thoughts!