Update v0.28 - Small changes

- New action for selecting the bottom item. - Modify enemies for not getting into walls. - Divide horizontal and vertical sensitivity of mouse and game-pad stick. - Simplified the format of the game settings file. - Fixed a bug - Key bindings were not imported from a file. - Fixed the size of items UI. - Switch Pro Controller is compatible now. - Fixed the achievement system.  - 'CLEARED ASSIST MODE' is unlocked when you cleared the Normal mode now.