Got the JS working for the info popups. Now they just need some CSS to work properly.
Click on a tile to get a message

I only wrote one message so far, but everything else works
fancified the artifact
Merge branch 'master' of github.com:dmazin/asteroid-tycoon
Made the popups interact properly with the rest of the UI.
top layer images
Merged changes.
Merge branch 'master' of https://github.com/dmazin/asteroid-tycoon
Fixed typo in definitions.
Merge branch 'master' of github.com:dmazin/asteroid-tycoon
animated tiles
Merge branch 'master' of github.com:dmazin/asteroid-tycoon
artifact fixed
Merge branch 'master' of github.com:dmazin/asteroid-tycoon
scary popup stuff
Merge branch 'master' of github.com:dmazin/asteroid-tycoon
fixing NaN'
die, artifacts, die
Merge branch 'master' into selectionScreeen