Voodoo Gold

You start with a screen that is 6 reels wide and 4 rows high. Voodoo Gold has an Avalanche mechanism. Symbols fall down. And do you have a winning combination? Then the winning symbols explode, everything up there falls down and new symbols appear on the empty spaces. Just like Gonzo's Quest, but without a multiplier, but with avalanche.
And there are plenty of empty spaces, because after every successful Avalanche you also get an extra row. You start with four rows. This increases to a maximum of 8 rows. So you start with 4,096 ways to win and that increases to a blood-curdling 262,144 ways to win.
You play on ELK Studios slots by default with 100 credits per spin. You can bet from € 0.20 and the maximum bet is € 100. In the latter case, a credit is therefore worth € 1.

Kane is the highest paying symbol. Six times Kane, once on each reel, will get you 250 credits. Ten other symbols pay out from 5 credits all the way up to 130 credits.
There are also 'mega symbols', these are 2 by 2, 3 by 3 or even 4 by 4 in size. Do you spin winning combinations under a 'Mega symbol'? Then the empty spaces turn into extra Wilds. That will almost certainly give you new winning combinations.
Special symbols are the bombs. There are two different ones: the regular bomb and the Dual Bomb. The regular bomb causes all symbols around the bomb to explode. If you spin two bombs, you trigger the 'Dual Bomb feature'. All symbols between the two bombs explode. New symbols will of course take the place of exploded symbols.

The bonus consists of 'free drops'. There are a few key differences from the base game:
Safety level: every time you win, the safety level increases by one row. After an avalanche that yields nothing, you fall back to your safety level. So in the bonus you play more often with more rows. Once you've raised the safety level to the 8th row, from then on you play every spin with 8 rows high.
Sticky Wilds: all Wild symbols are sticky and remain on your screen until the end of the Free Drops.
The number of free drops you play depends on the number of bonus symbols you spin. Three bonus symbols give you 6 Free Drops. The maximum number of free drops that you can unlock at once is 15 pieces. This requires 6 bonus symbols. Every time you spin at least three bonus symbols during the Free Drops, you get another Free Drops.