QoL update!

I updated the game to improve the general feel of the game. Some of the changes are:

• A menu, to customize the gameplay (add timers, change input buttons, ...)
• An undo button, to remove a block placed during a build session
• The player is pushed to the side when a block needs to be placed at its spot
• Better looking UI and menus
• Minor changes to sprites

I also added a download option to save and play the game offline on any platform of your choice,

Thank you for your support! :)