The only Mario platformer for DSi, what's the catch?

User Rating: 6 | Nintendo DSi Tokei: Famicom Mario Type DS
This isn't a proper game so this review will be styled rather differently:

Story: It's a clock? What would it be doing with a story?

The story is, I believe, Bowser has captured the Princess again, and charged a ransom of 1,200 coins. So Mario and Luigi go out into the world to collect the ransom, though every time they get it and save the Princess, Bowser captures her again.

Gameplay: You can do two things with this DSi application, watch a clock tick numbers away while Mario styled alarms go off, and control Mario & Luigi in a classic 2-D Super Mario Bros. graphics game with no cliffs, no fire flowers, and no enemies. The power-ups are Super Mushrooms and Poison Mushrooms. You have to collect coins for about a dozen levels, which change every fifteen minutes. You voyage through classic bricks, underground tunnels, cloudy sky, nighttime cloud lands, dark brick areas, and even the Koopa King's castle. After you collect 1,200 coins (A hundred for every number on a analog clock), the coins marked by little Marios and Luigis running on the clocks, you get a short video showing the rescue of Princess Peach. At the top of every hour you can enter a castle and watch fireworks appear, numbered after the current time (One for one o'clock, two for two o'clock, etc,). Afterwards you enter the castle and start I believe secret levels until you have them all.

Overall: The clock by itself is dull, and not worth getting. The game is rather fun and heavily addictive, it's hard to get yourself to stop when you say "Just a few more coins", and the classic Mario Bros. nostalgia is impossible to ignore. But it does get old after a while, and I don't find myself playing it as much as I used to. Plus your coins seem to max out at 99,999 (The total coins collected viewed when you press exit), and that means all you get is breaking you're one time collection record. 6/10 for addictiveness and eventual lackluster.