Hey There,
We are very far from putting this on Steam, but thanks a lot for the compliment !
Balancing was the last thing we did and we lacked time for it. The consumable items are meant to control the length of the sequence, but it eventually becomes too long. Games always need moar playtest 😉
About performance, we simply used baked lightmaps with fairly low settings, and we built with the "linker target" setting to "Both", which enables WebAssembly (a more modern alternative to ASM.js). The rest of the credits goes to Unity 😃
I'll make sure to check your submission !