Revert "Revert "HexGridScene""

This reverts commit 68b3bb014fb0ac88ff82e8d992f4928f120f6e80.
Revert "HexGridScene"

This reverts commit ad1076b0c7d4349c023dca2a761abaf6a3abdb3b.
Revert "Start Wave Button"

This reverts commit 9395fbce4caece70b9186b7d33322df471dcb90b.