The gimmick of this seems really cool, but I very quickly ended up softlocked - the blue room has several jumps that seem to only be possible when going left, so after entering that room with what ended up being a dead end past it, I could not get back to the start room to change the layout, and had to alt+f4 the game (which, shouldn't be necessary, if you're going to put your game in fullscreen by default you need at least a basic pause menu). In general the fact that you can only rearrange the rooms at the start room and inability to easily reset to that room seem like a perfect recipe for rampant softlocks - I'm honestly more surprised that other players seem to have actually been able to beat the game without issue, I guess most of the levels must be better designed about making sure you can actually backtrack through them without upgrades.
Even disregarding the softlock the rearranging felt a little finnicky? The interface for doing so wasn't immediately intuitive, and not being able to see any information about the actual internals of the rooms (even really basic info like which directions they actually connect in!) made the process of actually finding the right rooms to progress feel like tedious trial and error. I think other game's I've played with similar gimmicks show you at least a vague outline of what the room looks like as you're rearranging, which helps make it feel more like an actual puzzle and not something you have to brute force until you've memorized the layouts of each room.
While I didn't get very far the actual main gameplay seemed pretty solid - the controls have just enough retro stiffness to match the NES aesthetic while still feeling smooth and responsive enough to be comfortable, the visuals and music are appealing and cute (even if the status bar maybe feels a bit too directly lifted from kirby :P), and the zoomed out view is fun, even if doesn't serve much of a practical purpose. It's just the central gimmick that feels a bit half baked to me, which is understandable as it's a pretty ambitious gimmick to implement while also trying to make a competent metroidvania in the time limit, but it did leave me a little disappointed.