All Boomerang Studios games at Arkadino are slots, and there are fewer than 20. Only three are rated high volatility, so most of the range sits at low or medium.
The average RTP is 95.5%. There are no jackpot or Megaways games.
Alice in Lollyland and Wild Joker Blitz are rated low volatility, and 3 Wonders New Year Horse sits between low and medium. Gunslinger Glory and 3 Wonders Monster Pays are medium, while The Good Farmer, 3 Wonders Catch and Reel the Rum are a little above that. Low volatility means more frequent but smaller wins.
Alice in Lollyland and The Good Farmer top the list at 96.1%, with the 3 Wonders games next at 96.0%. Gunslinger Glory is the lowest of those listed at 94.0%, so the differences between games are small but real.
A bonus buy exists in under a third of the range, so in most games you reach the bonus round only by spinning. That suits a player who prefers not to buy bonuses at a multiple of the stake. Each game's page lists its details, and it is worth comparing RTP and volatility before choosing.
It is one reason to look: only three games are high volatility. You cannot remove the swings entirely, though, as results vary even in low volatility games.
On the game's own page, where the volatility rating is shown. Alice in Lollyland and Wild Joker Blitz, for instance, are rated low.