Version 1.3 represents a long overdue "quality of life" update that makes several adjustments to existing features and adds some cool new stuff. For instance...

The Grappling Hook:

This new ability unlocks at the third power-up in the sky. You can freely switch between the dirtpack and grapple, making it much easier (and much more fun!) to traverse up through the ground.

Other Key Changes:

• Improved movement animations for doggo.
  
• New HUD elements to serve as reminders of which features you've unlocked. These can also be turned off in the pause menu settings.
  
• Better-looking main menu that reflects if Ice Mode is enabled.
  
• Several new sound effects.
  
• Gamepad controls have been updated to utilize the D-pad for toggling hats and grid mode.
  
• Some of the original hats have been restored, so there's now a mix of original and Halloween-themed hats.
  
• Build radius starts out bigger and only needs one upgrade to max out.
  
• Jetpack fuel has been significantly increased.
  
• Carry limit upgrades have been slightly increased.
  
• Heavy blocks have been removed, so there's no longer an underground barrier that requires a power-up to get past.