No, it does not go in a straight line as it is meant to be to tease the cat. So, to make it easy to control via phone and let the cat play with it in specific areas, it is manufactured not to move in a straight line.

No. To operate it, the device being used must be close to the toy as it works with Bluetooth. The operational proximity depends on the general area covered by the device's sensitivity to Bluetooth.

Yes. The tail is replaceable and it can be removed by twisting it.

No, It can only be utilized via the app and cannot be used manually.