Thank you for taking the time to play our game! I think I was a little over zealous with the progression. While changes are happening every time you upgrade a tier, they are very very slight at first. As the kill tiers are at 10, 20, 30, 40, and 50, it takes a bit before you see a noticeable change. Sadly, after submission time was over, we figured out the crazy damage issue. The collision capsules for the enemies were still moving within the world and damaging the player.
We plan to continue to working on the project and fleshing out the progression is part of the plan. When we can upload again, we will put the upgraded copy up. It is more functional and hopefully more fun!
Thanks again for your time!