Thank you! I do aim to add complexity to my games if I get the right inspiration (this is my 5th jam, and I've made ~15+ games though not all are listed here). The nth Tilecraft is another "looks simple, but has depth" game I made (my first game jam game for JamCraft 3). I was having the worst time finding music so I hashed these out in under 10-20mins (not counting learning how to use LMMS and tried making instruments I would like).
My goal for game jams is to try and incorporate as many of the restrictions and requirements as possible since a great idea could come out of it. It doesn't always happen (My JamCraft 4 submission 2119 Simulator) but there's a chance. For the items, quite a few are just recolors, though when I revisit it I'll probably give them a proper sprite. As for what I could add to it, let me tell you that night 1 of the jam was hell on my brain since it just wouldn't turn off, so I have a document of probably 200+ items/crafting recipes and other various ideas.
Some designs in the game I should mention were lately made and I admit were not fully made with as much care as I would have liked to of given it. The player for instance was the very last sprite to be made XP The tree was done pretty quickly since you could probably tell it's design borrows from The nth Tilecraft's trees. I would have liked to make different trees for the different worlds (A cactus palm tree for Yellow, and a coral kelp tree for blue) just to give a feel of diversity. The flying enemy was also suppose to be a bird, but I was like "What can I make quickly but is consistent with angle" and which explains why it drops bones and feathers. I was hoping too of had enough time to make 1-2 more enemies, but ya know how jams go. :) I should really make a post-jam devlog instead of rambling here.
Thank you for your time and kind words, have a nice and safe day!