i recently coded a TD Game for Android. It's more like a Survival TD clone from the original WC3 mods. There are air , ground, boss and bonus levels involved. You can place towers wherever you want to "maze" the game field. Don't be so hard on me as it comes for graphics and sounds because I'm not "a game company" - i only code stuff for fun single-handed.
So feel free to grab a Demo Copy here (25 Levels Playable)
< snip >
or search the Market on your Android Phone with the term: "< snip >", or simply "< snip >"
Be Sure to build more Rifle Towers and Canon Towers. Poison Towers and Ice Towers are not "that" important in the first 25 Levels. (Level 15 is the first Air Level)