Hey there. Really a beautiful little game you've made and in such short time. Very impressive! The level design feels really intuitive, subtly guiding the player in the right direction, but still giving him the freedom to find his way and explore (except for maybe that underground area where you have to jump between those narrow, long "stone paths", i just couldn't find the exit).
I read through your dev blog entry aswell, awesome that you will continue to expand and enhance the game! Climbing is really needed as others have already pointed out. I have two other things I want to add:
1) From some preview screenshots it looks like there is going to be combat in future iterations of the game. I would suggest to keep this sparse however, because the game really lives from this all-alone-exloring-forgotten-ruins-vibe. Combat is a thing the new Tomb Raider games for example overdo compared to say the very first TR. Maybe you could add a non-combat exploration mode aswell for people who just want to do that.
2) I really like the overall design and the design of the protagonist. But one thing is a total immersion breaker for me: Why is she wearing those huge heels??? She is jumping, parkouring, climbing (hopefully in the future) and hiking around, it just doesn't make any sense. Please remove those awful heels!
Ok so much for my imput and keep up the awesome work! ;)