I certainly see black brush algae, the "fuzz" on several plant leaves. This is in the category of "problem algae" because no fish (or maybe one or two unsuited to small tanks) will eat this. The only control is to balance the light and nutrients. Like all algae, it occurs if it has nutrients, and in the presence of light. It will not go away, what is already there, but you can aim to get it under control so it does not increase, and then problem solved.
Light must be of sufficient intensity for the plants (and different plants have different requirements here, Java Fern is slow-growing so needs less intense light for example), the right spectrum (for plants), and the duration can then be used to control problem algae. Algae is not fussy over light, so it will take advantage if the light is somehow deficient for the higher plants.
Nutrients occur from fish being fed, water changes, and plant additives. Slow-growing plants need fewer, as with light.
Data on your light and what fertilizers you use will help us sort this out.
The algae on the tank glass is different, this you can remove with a sponge-type scraper or a sponge at each weekly water change.