Just checked with the Metamask guys, they're having problems on the backend (with Infura) due to Parity moving forward on the hardfork early. Short version--Mist currently works 100% for buying tiles/setting them, Metamask is currently delayed/not working but will be back asap (they're investigating/fixing right now and they're always quick).
Glad to see pixelmap! Great work! If or when I have some ether. There is a tile I like!
:D thank you so much
Hey ken I know the chat is great for questions concerns etc. possibly on the left hand side of your site what about a small 8-but Mario style information card .. just a few simple lines on what to do