Currently the score system is useless, as the game continues indefinitely.
Instead the player should be working towards the given goal, after which
the level should be cleared, some celebratory animations shown to the player, and a new level be created.

When moving a tile, in counting the size of a potential destination blob, the source blob said tile was part of, is erroneously added into the calculation.

This bug comes forth from the underlying blob-map caching algorithm, which needs to be rewritten.

If the player drags a tile outside of the playable area and releases it, the game crashes due to an invalid memory access.

The tiles on the lowest row are automatically set to return to their location, even if dragged by the player mouse