A Tetris-like game in which some pieces release water into the play area when they are cleared. As the water level rises, wooden blocks will float, separating them from metal and water blocks. This creates a two-tiered play area in which one must plan rows both at the surface and at the bottom of the water. The water level itself is managed by the player by submerging fireballs, which causes the water to evaporate.
Note: this was an old project made for the Unity web player back in Unity 4, which was recently ported to Unity 2018. It almost certainly has issues as a result... If there's interest I'll fix it properly in the future.