A complete and utter drag.
The aim of this game is to simply build a rollercoaster within a certain limited budget that works properly and doesn't crash. Asides from challenging yourself by trying to make spirals and loops and choosing different carriages, there is not really a lot more to be gained from this game.
The graphics seem similar to that of early LEGO games, with the idea of 3D rendering obviously not taken on board.
The game itself is over before you know it, being that there are not many levels and each is only different by either the budget or some other form of restriction.
Basically, not worth the trouble.