Do I need to improve my games retention improved?

so I have just released this game:

and I have sponsored it for the last 7 days. 20 credits a day. Will continue to do that until my game catches up with the algorithm.
Here are the stats so far:

is there anything that needs to be improved? The game got up to 500-700ccu with sponsors, it just currently got about 10 ccu without any sponsoring.

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