I don't know if this has been suggested/denied before, so...

I think that every time a player reaches every tenth level, they should be awarded with a special mouse-item not available to buy in shop. After reaching the required level, the player will then be able to find their new item in the shop.

For level ten, a head accessory, twenty an ear accessory, and so on.
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Supporters:

Catsloveraj
Flufferbug
Hixed
Juliantwofan
Megazan
Wingedflight

/support

Its a good reward for the players if they're saving for a certain accessory.

/subport

/Support

/Support *-*

/support

/no support

After about Level 60, the variable delay of getting cheese can be a boreful disaster.

/support!!!!!

/support

/no support
the skills you are able to have with the points you earn is enough reward imo.