Aqua critter why did my new aqua critter stop working after 5 minute

being an auqua source the bowl is probably cracked on the inside. Being a plumber, I would go with a mansfield toilet if your looking for a cheap quality toilet, Aqua source is garbage and you can see why

Check for restrictions causing the pump motor to be overworked.
Motor is overheating, the the Thermal Overload Switch senses that and will trip. Once the motor cools, it will restart.

these are a common problem for AquaSmart machines.
Your AquaSmart machine requires 4 new suspension damper rods & 4 top bands,

Make sure the propeller inside the unit is free and clear and spins properly. This affects the drive of the unit.

looks to me like as if the direction of the hose is incorrect. Check to see if there is a direction of flow arrow on the hose and point that arrow away from the tap towards the machine.

Your hose either has a hole in it, at the sections at the waters surface where it is exposed to the air? Even a "Pin" hole will create the symptom you are experiencing.
Or... there is a clog in the unit itself.
It appears that you are either sucking in air, or the water flow is being blocked. The pump should pull water no problem through a vacuum hose or a suction style pool cleaner. If the pump loses prime, then "Water" flow is being restricted either physically are mixing with air.

It looks like my cleaner. While it is hooked up to the filter, lift the unit, keep the suction side under water and flip it over. The feet should be moving. Feel for suction on the inlet on the underside.
There is a waterwheel inside the suction. Is it rotating? Is the suction hole clear, sometimes stones, acorns or other solid items get stuck in the suction that stop the water motor.
If there is something stuck inside or if the wheel is not moving, on my unit there are a few screws that can be removed to inspect inside. Naturally before doing this, disconnect the cleaner, drain it and take it to a location where it can be partially disassembled to inspect.
Gary

It most certainly is.
The simplest solution, is to sort of half the work for it, by collecting as much leaf litter, as you can with a net, before sending in the critter.
Also, a cover, will drastically minimize the amount of litter entering the water.
Have fun fishing:)