What Can I say...
2 Months ago I reviewed the original Penguin TD game and i gave it a 9. Why not a 10? Because I felt it was too easy. This new version of the game not only addresses that problem, but also adds a number of interesting new features to the game as well.
In terms of the difficulty, I was able to complete the all first Penguin TD's levels with mostly machine gun towers and a few missile towers. When I tried the Machine gun tactic here, I succeded on the first level, but got completely massacred in level 2 and the first bonus level. You've definatly uped the difficulty level of the game, and I like that. It makes the game much more challenging and much more satisfying to complete. I had to develop my strategy for each level in order to be successful. That's what it should be like.
In terms of new features, I'm glad that we now get to start the levels manually, without having to hurridly set up some towers in the first 20 seconds. Being able to call in waves early is also a good feature, as it can help to rake in money faster. The leveling system is also a good new feature, as it gives the player something else to aim for, other than just the completion of the level.
Overall, you've definatly improved the game, and moved my rating up from a 9 to a 10. Great job, i hope to see other games from you.