Very impressive stuff for the jam! The art is great and generally easy to read, and there's a lot in there that works well. I'd say the platforming itself is a bit weak (I know this is difficult), I would have preferred one less mechanic in favor of improving that I think. Another thing is it's not clear if it would ever end, which makes it so there's less incentive to continue, but I played until the tree was super massive at level 12 (the tree's growth is cool!). Great job!
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Yes it was fun and engaging for a while, a decent challenge without being too difficult overall, and the concept is a good one overall of growing and protecting your base. If you plan to keep working on it, I could see something like thronefall-style upgrades being very interesting in a game like this, where you choose different structures for different branches, e.g. automatically protect half your tree while the other half generates more essence for you while you protect it yourself. Oh yeah and I would say abilities like shooting and repairing should have a bit of a cooldown otherwise easy to cheese. Great job overall for sure!