Grand Blue: a killer whale that doubles wins, and up to 33 free spins

The letters on Grand Blue look like they've been blown out of glass, pale blue and full of bubbles, and they take up most of the reels. The picture symbols are fewer and brighter: a grinning shark, a sea turtle, a pink starfish, a yellow seahorse and a striped yellow fish. The line numbers run 1 to 25 down both edges, out of order.

The bet here is LINES 25 and PLAY 4, so 100 points a spin. GRAND, MAJOR, MINOR and MINI tick along the top. If you've played the older Great Blue on other apps, this will look very familiar.

Four bubbly 10s join up on line 21 in this capture, and a small black tag over reel 3 reads 100. A pink pearl clam, the scatter, sits on reel 1 just above.

The paytable

The clever bit of this paytable is the two columns. Every pay is printed twice, once normal and once for a win that includes the wild, because the orca doubles all wins it's part of. So five sharks or turtles pay 750, or 1,500 with a wild; five yellow fish 400 or 800; five seahorses or starfish 250 or 500. The A and K pay 150 or 300, and the lowest letters 100 or 200 for five.

The orca itself pays 10,000 for five, 2,500 for four, 250 for three and 10 for two. It substitutes for everything except the scatter.

The pearl clam scatter pays 500 for five, down to 2 for two, and the middle panel promises up to 33 free spins with up to a x15 multiplier. I didn't catch the free spins, so how those numbers are reached stays a question for the i page.

For a simpler reef, Dolphin runs just 9 lines. Laura has a wild that doubles wins as well, in a jungle setting. Both are on the Play8oy games list; the Play8oy overview covers accounts and cuci. To play, get a Play8oy game ID.

This game is for adults 18+. Online gambling is restricted in Malaysia; pick your limit before you start. See responsible gaming.