Bloxter (for Windows) 1.3.9

Bloxter is a fun arcade/puzzle game with 3D graphics, falling blocks and over 30 unique boards.
Play in 'Puzzle Mode' with classic gameplay and no distractions, or choose the challenging 'Arcade Mode' featuring bonus lamps and alien monsters.

Your job as a bloxter is to produce energy in a block reactor, using colored blocks and various tools.
You may encounter alien life-forms called vaders (Arcade Mode only). Some of these vaders are evil, while others will help you.

Bloxter is easy to learn, just drop colored blocks and try to form lines that will react and disappear.