Is there anything wrong with these set of moves?

1. c6, Nc5

2. c7, Na6

3. c8, Rb8

Are there any alternate moves?

Triiickyyyy...

nvm lol. Missed the pesky bishop guarding rook's path.

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chesswiz, thanks for posting an alternative line to 1...NxRb7. It is indeed best for black to leave the rook alone, but there is a slight mistake in the line you posted, and with correct play, white will still win. Here are some lines...

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Instead of Nc5, black must play Nd6, which makes the win much harder for white.

As several posters have mention, black is slightly better off rejecting the offered rook, though it would take a brave player to turn it down. Kf8 and Nc6 are the main alternatives. I have posted some lines for Nf8 above, following on from Chesswiz395's post at the bottom of page 7, so I'll post about Nc6 here (which is preferred by my software). Here are some lines...

Great puzzles, buuyuu. 

Tricky.

Clever - made quite a few false moves in that.

good