No time to be lazy - Update for Hotkeys and Air Paths

The last update was not published long ago, but here are some more additions to the game which are now available with the latest update.

As you can see this update mainly focuses on giving you additional hotkey controls in menus. Also there are changing in how the air paths are displayed.

Full change list here:

• Air paths can now be shown at will by toggling them with the corresponding button in the upper right corner in the game (or using the H key). Note: Blinking air paths will still be shown once airborne enemies have been spawned
  
• Air path default visibility can be set in the options menu
  
• Use the middle mouse key to scroll the camera
  
• Right-mouse can now be used to go back in or close the main menu, build menu and upgrade menu
  
• Hotkey added: Press T when a tower is selected to upgrade it
  
• Hotkey added: Press X when a tower is selected to sell it
  
• Hotkey added: Press 1 when a Nanite Tower is selected to toggle the nanite target
  
• Hotkeys added: Use numeric keys 1-4 to navigate the build menu and buy towers
  
• Showing loading overlay in main menu to clearly indicate that things are currently loading and you need to be patient for a second
  
• Loading all scores of a level group at once now (in sequence) and showing level selection once the first level score is available. The rest is loaded asynchronousl
  
• Adding and changing some ingame message hints
  
• Fixed issue that if the user score was not among the top 50 of the level it was not displayed in the level selection at all
  
• Achievements in connection with levels played will now only be unlocked if the level is actually played to the end (no matter if won or lost) rather than only started