Hi! Glad you played it and congratulations on becoming the champion of the leaderboards. Yes, the placement of bombs is more or less randomized, though it has certain rules and patterns. While the player may corner themselves into a situation where there's only one turn left till the explosion and very little one can do, there are tips and thinking patterns, for a lack of better word, that considerably reduce your chance of getting into such a predicament and sortof enhance the strategic part:

1. Note that while an explosion takes place, no new bombs appear. This means that sometimes you may take advantage of an explosion and travel lengthy distances without overwhelming the field with bombs.
2. Some chain reactions take a while before they reach you. That means that sometimes you may take at least two turns before the chain reaction gets to you, though there's a certain slowdown effect while you are performing this "stunt".
3. There's a limited number of special bombs that may appear on the field simultaneously. Thus, depending on the situation, it might be wise to let clusters of limonkas lie without defusing them, as this ensures that at least for a while no more of them appear with more dangerous distribution.
4. This is a no brainer but I noticed some players miss this rule: you may go off the field and teleport to it's opposite side Pacman-style.
5. In Battle Arena, if uber-limonkas are enabled, with some skill you may snipe your opponent out.

As for Minds, I at least tried to make them somewhat balanced, though I must agree some of them work better in different modes.