Aqua panic - DS

I have the rom on my edge card and the game works, but how do I control the icons on the top screen? I just assumed it was a DSi game and have not touched it since last week.Am I just not pressing the right button or something as inane.
Any help would be great as I love lemmings and this looks fab to play.

It's not a DSi game.

Can anbody tell me the controls then please? I am not playing it on a DSi just a DS with an edge card.How can I access the icons on the top screen to change the power ups?Sorry but seem to be stuck and know its something really easy.