my table is on carpet
add 100-150 pounds to the table using 25 lb bags of lead shot - these are pretty expensive but they work really good
the other option is 25 pd bags of salt (from Dollar General) for $4 each or 50 lb bags of sand
or collect milk bottles, clean them out and fill them with water and they are about 8 lbs a peice...lot more work over a longer period of time but it is cheap
this will help with your issue and improve play