Click the squares at the top to select what tile to place. Click or hold and drag your mouse on squares in the grid to add that tile. You can walk on ground. Stone acts as a wall. Lava makes you start over. You spawn at the blue square.
Please leave a Love and Favourite if you like it! I made this quite a long time ago, I hope you find it fun though! It's great this has gone from around 200 to over 1000 views from being in a featured studio! I recently added that you could drag your mouse to build rather than click over and over.