Thanks for playing!
So the map thing was sort of an afterthought. I wasn't originally going to have one, and have just have getting lost be part of the game. Then I figured once it gets bigger the map would be a nice efficiency to work toward, so I was going to map the map purchasable. Then I though, no, getting lost like this is just frustrating, and I made it free. So I didn't end up spending a lot of time on it. If I end up adding to it, improving the map would definitely be in the plans.
I like the robot counter idea. Maybe I'll just make a detailed stats screen that shows you all the numbers.
About how many caves did you get to before crashing? I did a fast-forward run on my computer and got thousands fine, but it's also a new computer, so it makes sense that other machines would struggle. Plus I added some things after the test that maybe I didn't optimize right. Honestly I wasn't expecting people to actually shoot for thousands of caves. Most people tend to play jam games for only like five minutes. But I find endless games kind of boring without any real milestones, so I added the achievements and made a couple of them that I thought were kind of insane just in case people were playing for that long.
I actually have this whole list of other upgrades I never got to. Robots that dig vertically and place ladders, teleporters, decorative landmarks, surveybots that post arrows pointing toward rare gem pockets, etc. I just started to get burnt out / run out of time and didn't end up getting to those ideas, but maybe they'll make a showing in a future update.