it is playable, but is simply a walking simulator. go from x to y, fight story battle and loose, go from z to a, win but enemy respawns, wander in b (maze) until rng spawns the required rare enemy. if the frostbite rat was in a set location with an overworld sprite, it wouldnt be an issue, but instead you wander around for hours for the combat and cant run from the grunts with no exp system to reward you. Combat system is also simply "spam action and win".
as a demo, it wouldnt be horrible, but needs a lot of expanding and QoL upgrades before i could recommend or even remember it exists.