Hi Kia. By all means use the tiles. The first thing to do would be to prime the concrete with diluted PVA. Something around 3 parts water to 1 PVA.
Mix some regular mortar. Roughly 3 sand to 1 cement.
Paste the back of each tile with neat PVA.
Either apply the mortar to the concrete, or to the tile, then stick it in place.
To stop everything sliding around too much, let the diluted PVA on the concrete get tacky before tiling.
Carefully prop the bottom course of tiles to keep them all from slumping.
Your most difficult decision will be what to do at the corners, if the tiles have no "face" edge.
Screws may be added afterwards if they're likely to get kicked. Just drill right through the tile into the concrete with a 6mm masonry drill.
Poke a red Rawlplug into the hole with a 2" x 8 screw, and screw it in.
Countersink the hole first with a 10mm drill bit.
How you cover the screw head rather depends on the tile, but, powdered tile dust mixed with PVA will do it.