Benny the Beer is an invigorating online slot game designed by Hacksaw Gaming. It is characterized by fascinating characters and substantial gameplay mechanics that provide an immersive experience for players. Below are the distinct features and mechanics of the game:

**Theme and Storyline Reframing**
Take part in the blissful summer picnic with Benny and his camera companion. The game is set in a tranquil, picturesque meadow, adorned by windswept green grass and towering trees. The atmosphere changes once you activate the bonus feature and the Oktoberfest season commences. The woods turn into a festive scene with beer kegs and other decorations.

**Reels and Paylines**
The game possesses 5x4 reels and 1,024 paylines. However, this number escalates dynamically when the StackWays come into play, reaching a staggering 100,000 paylines.

**Symbols**
There are 9 regular symbols which include four lower-paying card ranks from Jack to Ace and five high-paying locks, clocks, cameras, bombs, and Benny himself. All pay from 3-of-a-kind and more, when landing on adjacent reels starting from the leftmost. However, there are no Wilds in the game, hence no substitutes for the symbols in the base game or free spins.

**Special Features and Bonuses**
Two unique types of free spins are featured in Benny the Beer, these include Book of StackWays and Super Book StackWays. Also, there are different bonus buy options.

**StackWays**
This feature incorporates two types of StackWays symbols. Regular ones have values of 1, 2, 3, or 4, while Revealing StackWays show values of 5, 6, 7, 8, 9, or 10 at random. This reflects the number of stacked symbols to be added to the reel.

**Book of StackWays**
This feature initiates a round of 10 free spins, triggered by landing three bonus symbols on a single base spin. Two special symbols are randomly selected beforehand.

**Super Book of StackWays**
This feature employs four special symbols and can be accessed by either landing four bonus symbols simultaneously or upgrading from the Book of StackWays feature.

**Bonus Buy**
The game provides various bonus buy options which offer increased chances of triggering free spins, guaranteed appearance of StackWays symbols, and direct triggering of either type of free spins either at an increased cost or bet.

**RTP, Volatility, and Maximum Win**
The default RTP value is 96.17%, with volatility rated as medium (3 out of 5). The game promises frequent returns about every three spins with a hit rate of 37.79%. The maximum win is limited to 10,000x the stake.

In conclusion, Benny the Beer is a visually pleasing online slot game with exceptional artwork, and enjoyable valid mechanics. Its high hit rate and potential for substantial wins make it an attractive option for gamers.