Review Time!
Starting with the positives, this game has many interesting concepts! An endless runner where you travel through eras is a pretty cool concept! I also really like how you can alternate between charging an attack and regenerating your health. It makes health regeneration a very useful tool, but not something broken. It's balanced and fun to use.
Now for some criticism. The game doesn't control quite ideally. Being able to accumulate speed by sliding down slopes is very welcome, but losing speed by simply climbing slopes is not. It often makes the game a bit frustrating, sometimes even unfair, because it actively works against you when trying to avoid enemies. In spite of that, the controls can still be somewhat fun. Jumping works fine enough.
I did say that health regeneration is balanced and fun, and it is, but I also think the witch's damage should have been a bit higher, because just tanking the hit and keep regenerating is usually a perfectly viable option. You will only really need to avoid the witch's damage if your health is very low, which I admit is something that can happen not so rarely.
Overall, it's a fun time with some interesting concepts. Just some rebalancing and control changes would have turned this into gold. Some variety would have been welcome as well, but I know quite well how little two weeks are, so it's perfectly excusable.