Thank you for response!
Yeah, I decided to leave it on GLES3. When I converted it to GLES2 it just completely changed the look of the game (glasses, lightning...) and I didn't like how it looked like. This was my first 3D project so I am still absorbing the theory of materials and stuff like this and didn't have time to mess with it again. I already spent a lot of time with it in GLES3 and setting it again to look how I want in GLES2 didn't sound like a good idea form me :D. I tested it in browser in GLES3 and it worked so I just left it this way. Maybe it wasn't the smartest idea though.