I died 3 times, reset the island but my level is still -3. Idk if this is a bug but I was told to file it here!!
https://www.ecocitycraft.com/forum/posts/976934 - Jamie confirmed that the Skyblock level only depends on the island's placed blocks and is not affected by death. So... works as intended, unless I'm missing something here?
No, to increase it you place blocks and complete challenges. Deaths drop you by 1 island level each time.
Yea so weird thing was I died 3 times and my level was 0. Then I got my new island checked my level and was -3