Here is the tips to be pro for the game.
Short Tips
Stars
If you are short of silver, never ever pay with stars instead! Stars are to valuable for this.
Daily Reward
Don’t forget your daily reward. More in the chapter Daily Rewards.
Effects
Most similar effects do not stack. More in the chapter Stacking Effects.
Resource Mines
Swapping a mine does not change the kind of resource.
Ship
Do all ship upgrades as fast as you can, but don’t waste stars to speed it up.
Booster Packs
The content of booster packs is getting better with higher player levels.
Experience
Crew member Pied Piper is a mixed blessing, because only the player gets more XP. The towers are not effected!
I used him only at the end of the levels, when my main towers had already max XP.
More infos about the crew members in the chapter Crew Members.
Daily Rewards
The games rewards you daily for starting the game.
Even if you don’t want to play a mission you should start the game and grab your reward!
You have 28 days to get all 25 rewards of a table. Of course the last row contains the best rewards.
Here you can see the first three tables.
The faces are additional crew members.
Stacking Effects
Most similar effects do not stack.
prime injector + deadly strike = bug?
https://steamcommunity.com/app/429540/discussions/2/3561682880010030369/
How does DoT stacking work?
https://steamcommunity.com/app/429540/discussions/2/1741104717707949003/
Towers and Strategy
The best low-level towers
https://steamcommunity.com/app/429540/discussions/2/1741103267282048229/
Your standard tower openers?
https://steamcommunity.com/app/429540/discussions/2/1741105170036920144/
Post your best strategies
https://steamcommunity.com/app/429540/discussions/2/1741105805752494996/
Bad legendary towers
https://steamcommunity.com/app/429540/discussions/2/3300476731142115417/
Crew Members
The description of the Duelist is not correct, more in the following post:
Questions about Crew
https://steamcommunity.com/app/429540/discussions/2/1741105170032142754/
This guide was written by Marbur