Alright I popped in Slime world for my first time ever and literally beat it (I think) on the first playthrough in something like 30 minutes or less. I just kept referring to the terrible maps on the screen and then got to a hole that you jump upwards through and then it loaded me into the space ship.
It just kept scrolling "Congratulations" and a few other words at the top of a cartoon character and that was it, I couldn't go back to anything, couldn't move forward to any other levels. I am honestly not sure if I beat it or not but the game I couldn't imagine was that fast and simple.
In looking around online there was mention of multiple levels and maps and I just couldn't seem to get anything going after the Congratulations screen so I just turned it off. I've found there are supposed to be exploration, action, suspense, logic, arcade, combat but have no clue how to get to that at all.