Master Any Language has a counterintuitive interface with activities that are frustrating to navigate. Its only perk is that it supports less-studied languages, but even if you do find yourself lacking resources in your target language, this website will probably detract from your learning. You will jump through hoops trying to find the audio recordings by native speakers, so you may want to try ilovelanguages or Learn101 instead; they have low ratings, but they won’t make you lose your motivation to learn altogether.
Most of the activities on Master Any Language are matching games that require you to click on two identical characters, words, or letters: the purpose of this is unclear because it tests neither recall nor recognition. Another activity asks you to form or match nonsensical sequences of words (Ex. Find the sentence identical to “el el el el tchèque tchèque tchèque el el tchèque tchèque”….).
Ultimately, you would probably be better off trying to decipher a page of text with absolutely no guidance than to even attempt to wrap your head around MAL’s activities.