Do you mean cheats like codes or cheats as in tips?
Pro tip:
Buy about 100 coins and play either the monster arena game or poker until you get about 3000-5000 coins. Save if you win in between or reset if you fail.
After getting about 3000-5000 coins, play the 100-coin slot (the very top slot machine). Bet 900 (3x all the lines). Save/Reset if you need.
The top machine has an incredible likelihood to score 5 watermelons, which with 3x line, will net you 300,000 coins, which is enough to buy 1 of each of the top items. It also has a pretty good probability of scoring anywhere between 20x to 100x to slowly increment your pool.