Tower Up

No — city planning forbids two adjacent buildings of the same color; you must obey this rule when placing starting floors and when starting new buildings (pages 2, 4).

Yes — when you start a building you must add one floor to each directly adjacent building paid from your supply, and each paid floor must match the color of the building it is placed on (you cannot use multicolored floors to create mixed-color buildings); if you cannot afford the payments you cannot start that building (page 6).

You place exactly one roof per turn and it must be placed on one of the floors you just placed that turn — either the new building or a floor you added as payment — you may not place it on arbitrary existing buildings (page 6).

After moving markers for scoring, if all your vehicle markers have reached or passed the star column on your personal board you immediately get an extra turn; reaching a star is sufficient, extra turns can chain, and you get only one extra turn per check even if multiple markers jump columns (pages 7–8).

If a depicted floor is unavailable you may take any floor color you like instead, and this shortage also triggers the end of the game — every player (including you) gets a final turn (page 8).

Placing your last roof triggers the final phase: finish your turn, count the number of visible roofs to place your cone, let opponents take their final turns, then sum millions from your markers and bonus chips for final score; ties are broken by who has the most remaining floors, and if still tied the players share victory (page 7).