3/5 without mods, 4.5/5 with mods. Modding this game is mandatory. Recommended baseline mods are the MoreCompany and LateCompany so it is easier to play with friends who may not all be on the same schedule (being a working adult can be rough!), plus ShipLoot to fix a pretty big QoL problem. Once you get tired of that, you can add cosmetic mods like More_Suits and More_Emotes, or add new challenges with mods like Mimics and Skinwalkers. Also, GokuBracken is way funnier than it has any right to be. Only complaints I have after modding are that there are still too few levels and the gameplay can get same-y after a while. This is to be expected of an early access project from a solo dev. You can stave this off a bit by playing with big groups of people, which will help you quickly clear early levels and get lots of money, then in the second 3-day cycle, use that money to go to levels that cost money to reach before you're well-equipped enough to tackle them. Being woefully underequipped makes the game more exciting.