Well, the picture isn't loading for me, dunno if you're in the process of updating the pic or what, so this is based on me not seeing your example.
make sure you can easily remove the adhesive/mastic/mortar you need to adhere the tiles to the floor. If it's not easy, mebbe think about doing a WAY lighter design, perhaps an off white and the invader a light light grey if you really wanna do it.
I myself would do it

Also, make sure you have standard sized tiles (12" or 4").
What about a laminated wood floor w/the invader being darker color? The lams will come in a pack, making it more likely that you'll not have to spend any money on extra materials to replace/cover the guy in case you need to. It'll also let you put some insulation underneath which'll also act as a bit of cushioning.