I love the premise of using ancient tombs and ancient cultures in the plot. There's so much you can do there.
Here is my feedback:
1. Hard start: It took me a while to understand what I should do. The open map didn't help. I went to two different places before I got what I had to do.
2. Negative space. Be mindful of how much negative space (non-used space) you put in between sections. If it is too much, the game loses momentum as you move. I would recommend adding more non walkable elements, so the paths to move are clearer. Or make the maps smaller and use the edges to signal you're moving to another of the level.
3. Dialogues: Some of them felt too long. A trick most games use is: the first time you talk with the NPC triggers the full dialogue, from the 2nd time, you get the last sentence or last couple of sentences.
4. Nice BG Music: very suitable for the vibe and aesthetics of the stage. Great choice.
5. Lovely Pixel Art: What you have so far, is delightful. Great job.