One major flaw that completely ruined the game for me.
The result is that you'll spend 15-30 minutes or even more just getting to where you left off, and that made me not want to play the game anymore.
For a while I forced myself to play it anyway but one time when I was thinking if I want to play something else or this game I told myself that I should play this game even though I knew it will frustrate me, so I turned my dreamcast on and went through the same route of finding my way but then I got lost and I didn't want to find the way because it was so repetitive and boring that I just turned the DC off and played something else and never looked at this game again.