This is the 6672nd most frequent Japanese word.
ハマる
To become deeply engaged or obsessed with something.
In this sentence, 'ハマる' is used in the context of becoming deeply interested or absorbed in an activity, indicating enthusiasm or passion for it.
彼女は最近写真撮影にハマっています。
She has recently become very into photography.
Here, 'ハマる' conveys getting hooked or fascinated by something such that it captivates the individual and draws their attention significantly.
そのドラマにはまってしまったので、夜更かしして一気に見てしまいました。
I got hooked on that drama, so I stayed up late and watched it all at once.
In this case, 'ハマる' is used to describe the design of the game as being appealing and fitting for the preferences of a specific group of people.