Hotel Mario is one of the 4 non-Nintendo titles of Nintendo franchises on the Philips CD-i.
Mario and Luigi want to go on a Picnic with Princess Peach, although, Mario later found a letter from Bowsr that he kinapped Peach, and put her in one of his 7 Koopa hotels, and he dares Mario "to find her if he can".
The gameplay is that Mario has to shut all the doors in the level in order to beat the stage, and after a few levels of doing so, and then there's a boss level, where you fight the boss. After beating the boss, you move on in the game. Usually coming out of the doors are enemys, you can re-open doors, and hide in the doors by hitting up, and hit down to step out (works same way in evevators).