No, God isn't evil.

1. The devil doesn't punish people.
2. Yes, God knew that mankind would sin but he created us anyway. That's absolutely awesome of God.
3. Yes, mankind is sinful. That doesn't make God evil.
4. The Bible gives more than enough evidence for Satan's existence and God's existence.
5. There's plenty of evidence to believe in God. The Bible is filled with examples where God interacted with men and gave messages to them.
6. There is suffering in the world. That doesn't make God evil.
7. God DID create mankind without sin. But they chose to sin. Every person ever born since then, except for Jesus, has the same sin nature.
8. God is free to create whatever universe he wanted. It doesn't matter if the universe is filled with life or if the earth is the only place it exists.
9. God created a world without disease but mankind sinned.
10. God makes himself known to those that earnestly seek him. We have the Bible. We have the written testimony of the Old Testament prophets and of those who knew Jesus. And God said this,

(Romans 1:18-20 NIV) The wrath of God is being revealed from heaven against all the godlessness and wickedness of men who suppress the truth by their wickedness, {19} since what may be known about God is plain to them, because God has made it plain to them. {20} For since the creation of the world God's invisible qualities--his eternal power and divine nature--have been clearly seen, being understood from what has been made, so that men are without excuse.