Neat idea and cute graphics! It gets busy quite fast, I was able to survive until I reached level 6.
I explored a lot during my first playthrough but I hadn't understood I had to protect the spider and eggs. During my second game, I kept close to the spider and this was much more effective. The map is big, but there is nothing to gain by exploring. I would either reduce the map size or provide some reward for taking the risk of temporary leaving the spider behind. The chests didn't seem to provide any sort of bonus, or maybe they just give xp, but what they do should be more obvious.
The patches of color on the ground look a bit weird, I think a single color would be more consistent. You could add obstacles to provide some visual variety.
The leaderboard didn't seem to work, it just displays "fetching..." for every row.
I had fun and loved the sense of progression when you level up, the upgrade system is great 😊 Great work!