What I did

I got to wave 13 by making rows of laser turrets.

Bugs found

• Loading in with space age crashes on startup
• Impossible to buy the super turret since the shop chest only has enough slots for 500 ore
• Debug crafting recipes are available (miners, shop chest, etc...)
• Loading the save gives starting equipment every time.
• You can't make a maze with walls and turrets since the bugs attack what's in front of them.

Suggestions

• Make the shop a bottomless chest.
• Some kind of loader mod as suggested.
• Add a mechanic to send ore to the shop chest (Could take from nearby chests)
• Make the shop a requester chest. Give each item a cost (so trains can be used late game)
• Use custom enemies (for increased health/resistance) (make enemies split on death)

Thanks for the feedback! I wasn't actually ready for anyone to try this yet - but I believe accidentally through my own playthroughs I have addressed all your bugs and suggestions!

(see changelog if you are curious)

For your suggestions:
- mazing is now available! use the stone furnaces and can turn them into water tiles! (can buy more stone furnaces and also there is a 'full wall' of water check and prevention). Can then clog it up with walls to help slow down biters more
- shop chest is now much larger
- instead of loader there is an inserter you start with (also in the shop) that doesn't require energy
- intentionally belts are expected to be used, or manual mining :) to get the ore to the chest
- first custom enemy introduced now in the last waves!

Will look into later, good to note:
- loading with space age mod, will take a look into this
- great point about the debug crafting recipes still being there - will fix soon
- loading saves gives starting equipment is an issue, thanks for catching