There's something to be said for execution: a great if minimalistic idea can fall flat without the proper balance and coding.
Despite the obvious potion glitch (love that, btw xD), a game is hideously unbalanced if a high level character can get killed on the easiest stage solely due to bad luck, and it's happened to me personally more than once. It also hampers the PC when side quests themselves (i.e. the five slimes one), won't work either.
It's really quite a shame when the game itself is quite fun, but when anyone with half a shred of intelligence can realize that the only feasible way of nailing the Level 12 badge is to grind the first level, and even then you can still get killed by blind luck (or really, lack thereof).
It's such a waste too. All the game needs are a few bug fixes and a BGM track or two, and it would skyrocket the overall acceptability of the experience to at least three stars. =/