Most, if not all of the new blocks/resources/enemies have already been implemented. What remains to be done:
- New maps (including sandbox maps)
- Different wave structure (with later waves being more varied instead of just more enemies)
- Improved enemy AI
- Finish up a few blocks
- New tutorial (since the current one is broken, and doesn't cover the new power system)
- Possibly new sound effects for some blocks and enemies that don't have any
- Balancing and testing of everything that's been added
How long will this take? I don't know, and with finals coming up, I may not be able to have a lot of time to work on this. I would estimate it should be done in 3 weeks, maybe a bit longer if something comes up.