I love the concept and the goofy movements of the caveman — it’s really fun!
However, I feel like the game might work better as a 2D sidescroller. Right now, the player doesn’t have many actions available, and progression feels a bit too slow. It takes quite a lot of effort to move forward, which can make the gameplay feel repetitive and might cause players to stop before reaching later stages.
For example, I was only able to play through the Stone Age part — the Medieval and Today sections felt too difficult to reach.
Still, I think the idea is great. Keep it up!