4 - A lot of potential here and it looks like you made an effort to try to be creative. Criticism; in my opinion, you would need to either go really 'simple' to pull this off, compositionally and colors, with the focus on the 'bath/bubble' entirely with the background and base 'neglible', to create an 'illusion' or else 'create depth' in your 'illusion' using the other 'pieces', while no expert at this, I think the latter would be harder to achieve. The 'scale' of the taps on the soapdish(?) will inhibit any illusion anyway. Creative use of what looks like a cardboard box at the 'back' though and the texture has potential too. I think the plant/leaves is disproportionate and detracts, as does the paper towel/napkin/serviette, though it does have a kind of 'rug' pattern so perhaps potential with that too, not sure. Angle and lighting need attention too. But mostly, for this Challenge, you have fairly good focus and detail on the bubble(s), so well done on that - not easy.
I'm not sure what this is. Something blowing bubbles on a paper towel with a corrugated cardboard background?The purple bubble thing is kind of interesting; and you might try focusing on it while eliminating the distracting background and foreground elements. JMHO.
Ahhh... They're taps! - It took me a few seconds to register what I was looking at. To be honest, on first viewing I thought these two black things were dogs sitting up... Nice idea, although lots of elements here to attract the attention, perhaps a bit too busy (removing the plant and that blue thing in the foreground might have improved it slightly)