Mappy Arrangement/Rounds 18-21

Round 18
The eighteenth round (which, along with the next two, features neon signs of Cherries, "7" Cards and Nyamco's head on the outside of its attic) contains eighteen platforms, two regular doors (one of which has a knob on both sides), two power doors, seven regular trampolines, four Mewkies and two bells.

Round 19
The nineteenth round (which has a different attic to the eighteenth one) contains fifteen platforms, one regular door, three power doors, five levers, five regular trampolines, and four Mewkies; in addition to the text of "HURRY" flying across the screen after less time has passed, the Gosenzo will also be appearing sooner now (so the mice have to finish the remaining regular rounds as quickly as they can to avoid a situation where death is inescapable).

Round 20
The twentieth round (which has the same attic as the eighteenth one) contains eighteen platforms, two regular doors (one of which has a knob on both sides), two power doors, one lever, five regular trampolines and four Mewkies; after clearing this round, the game will announce its fifth and last bonus round, with the text "BONUS ROUND. STING S IN TIME.". As with the previous four, it contains ten red balloons and one randomly-placed Nyamco balloon, and the mice will have thirty seconds to collect all eleven balloons between them - however, they must time a jump to the left for collecting the eighth red balloon before landing on the trampoline under it, because if they do not, it shall become impossible to finish the round without breaking the trampoline and falling off the bottom of the screen (the ninth and tenth red balloons are also under it so they must jump on it twice more to grab them).

Round 21
The twenty-first round contains thirty regular trampolines; as mentioned above, the mouse who is to get that eighth red balloon must time a jump to the left for collecting it before landing on the trampoline under it, because if he does not, it shall become impossible to finish the round without breaking the trampoline and falling off the bottom of the screen, as the ninth and tenth red balloons are also under it, so he must jump on it twice more to grab them.

Once either mouse has collected the Nyamco balloon, the stars in the background shall glow; the text "EARNINGS" will then be displayed at the top of the screen as the balloons both players collected are displayed under their mice (they shall receive 200 points for every red balloon they collected and 2000 points for the Nyamco balloon). If Mappy (or Mapiko) collected all eleven of the balloons in a one-player game he will also receive a "PERFECT" bonus of 10000 points - however, in a two-player game, the mouse who collected the Nyamco balloon shall receive a "WIN" bonus of the same value.