Love the colours and subtle wear 'n tear. The back fig looks a bit odd - is he in place? To me, looks like he's hopping. Can he hold onto something?
Watch the plastic seam on the sand channel at rear. Can you make that look a bit thinner too, or worn?
Cool job all round.
I might be inspired now - never had one but that extra gun gives more interest. I see Resicast are also doing new tyres for this.