Anyone can place a kick and a snare on a grid in five minutes. Getting the result to push forward instead of dragging is another matter, and it doesn't come from knowing more patterns: it comes from hearing the difference between a hit landing exactly on the beat and one landing a few milliseconds early or late.
Nudging the snare early gives urgency; pushing it late gives ease; varying hi-hat intensity turns a mechanical sequence into something that sounds played. Glitch Beats lets you program the pattern and then move it, so you hear the effect of each shift instead of reading about it.
Another part of the game hands you a beat with something broken and asks you to find it. It's deliberately uncomfortable, because diagnosing is harder than creating: building from scratch you pick what you like, whereas fixing means identifying what specifically doesn't work in something that already exists. It's exactly the skill mixing asks for.
For the dynamics side — how hard each hit lands and why — see the compression guide, and to pull the tempo off a reference to work over, the BPM detector.