Hey there! First of all thanks for playing, and second - thanks for reporting the bugs :) In particular:
- that was a design decision so as not to reveal too much of the level in map view (kinda like the fog of war), but I may have taken it too far, in fact I increased the maximum zoom out level twice already, I will increase it further in the next build and then we'll see how it works;
- yeah, that is known bug, I am right now refactoring lots of stuff and those checks are right now caught somewhere in between... On the other hand, there was a wrong setting in some of the terrain colliders, I fixed that already (as it's only a checkbox) and the proper tunnel checks are next in line;
- it's not the grid that's flashing but tile seams, at least I think so... I belive it's a problem with my placeholder graphics as it didn't happen when I used other tiles (in particular those by Ansimuz)... I decided not to waste much time on that because the game jam deadline and also due to it not being real graphics (and may be solved on its own when I introduce those)...
Thanks again for playing as well as valuable comments!