Natto-Cat

You control the actions of agent RB51, a cyborg kitty (half Russian Blue, half
robot) with a hankering for natto, the tasty Japanese snack. RB51 roots around
digging tunnels in what appear to be brown rice puffs in search of bags of
natto cat treats, trying to avoid being crushed by dried plums or menaced by
rabbits or ambulatory bowls of custard — but having no qualms about dropping
plums on them. (That’s just what it takes to be an agent — James Bond
wouldn’t blink at the prospect of taking out a counterintel agent with a
plum.) When enough treats have been collected, the level’s gate activates and
passage to the next level is enabled.

If it doesn’t sound familiar, what this amounts to is a reskinned Boulder Dash
clone, to such an extent that Natto-Cat even supports Boulder Dash levels…
as well as fan-made ones designed in its own included level editor.