We've just uploaded a fix for some major issues we experienced during the fist day of our game's release. Thank you for pointing us in the right direction with your comments!

1. Reduced damage received from enemies
   
2. Decreased maximum health of all enemies
   
3. Fixed an issue with receiving shards for opening new content
   
4. Decreased the number of enemies in waves
   
5. Increased the effect of perks between waves
   
6. Added the ability to get pieces of content for killing common enemies
   
7. Added new notification when opening a piece of content (when collecting all pieces of the same content)
   
8. Added extra notification in in the main menu when opening a new content

If you experience any issues with our game still - please let us know, we'll try to fix them asap.