Version 0.8.7 of Mister Tins focuses on sound improvements. New sound effects were added for boxes, death and victory; also the UI now has basic sounds. During the game, the current level and time is displayed. There is also a new drawing of Mister Tins in the main menu.
There's not much left to be done, I'm planning to add some ambient sound effects, perhaps add a few more floor and wall variants, and fix some remaining minor issues. In the meantime I'm focusing on creating various level generators, as this is a really powerful potential of the game.