Is this laptop any good for casual gaming?

No. A6-6310. And, at $359 is not priced well even at 6GB 1TB.

A8-6410 6GB 1TB @ $280:
http://www.bestbuy.com/...Id=4907904

By $390, an i5-6200U
http://www.bestbuy.com/...Id=4961000

There are laptops in-between at Bestbuy, Amazon, and newegg.com

CPU:
https://www.cpubenchmark.net/...u_list.php
A6-6310 APU2371
A8-6410 APU2518
i5-6200U @ 2.30GHz3894

And, more important in gaming is the graphics processing.
The R4 6310 and R5 6410 are surprisingly close
http://www.game-debate.com/...on-r5-6410
But Intel HD 520 is much better:
http://www.game-debate.com/...on-r4-6310
HD 5500 of 5th gen Intel core i is better than the AMD A6-6310
http://www.game-debate.com/...on-r4-6310
and HD 4400 of 4th gen is even better than the A6-6310
http://www.game-debate.com/...400-mobile

Any Intel core i or 4th generation or newer beats the laptop you found.
Pretty much A8's and A10's should beat it, and A10's tend to beat Intel HD graphics.

Find a different laptop if you have not bought that one.
If you bought it, it should play older games OK
In this slow loading table, it is below rank #360 (HD 4400)
http://www.notebookcheck.net/...849.0.html