Thanks a ton for comment and feedback! :)
1) Yea, the minimap is a must, and some more pointers to get player to the right place. On the list. :)
2) Healthbar, propably/definitely, especially if I add different kind of enemies. Shooters and stuff. The original idea was that a character could survive couple of explosions, and you'd have a maximum of 5 characters, so that'd be like 10 total hitpoints. Also need an indicator to tell you when a character has been hit. But yea, healthbars would a good idea.
3) Oh snap! True. Esc-menu is there but not a real game over menu. Good point!