Here are the patch notes for the patch 1.1.0.1 adressing balancing changes for higher levels as well as bugfixes.

Balancing:

• Tier 9 enemies (Flying Cookie, Cookie Jar) do now spawn already after level 26 with a very low spawn rate. This should make the difficulty progression more steady.
  
• Tier 9 enemy spawn rate after level 28 has been decreased slightly. This should even out the difficulty jump towards endgame.
  

Bugfixes:

• The spawn patterns for the Banana Boss has been adjusted to prevent bananas spawning directly on the spaceship position.
  
• The season countdown has now been fixed to display the right remaining hours, minutes and seconds.
  
• Fixed the death counter. Your deaths should now be properly tracked in the steam statistics
  

We wish you a lot of fun with the new update.