As a 2016/2017 Christmas gift for the community I published a completely free (ad-free and no in-game purchases) game called Bugs.
It’s a Tower Defence clone where you fight wave upon wave of bugs trying to get to the other side across several levels. It gets hellishly difficult towards the end. You need a lot of pre-planning and strategy to make it even to the second level.
It’s totally free, no strings attached!
Download for your device here: