I'm fond of first-person games, and sprite scaling is the easiest way to make them, even taking modern engines into account. It just requires quite a bit of CPU power, or else lots of storage, but modern PCs have plenty of both. My latest attempt is a game called Electric Rogue (in development as of May 2017), which gave me a pretext to practice vector drawing. Included sprites:

• two pairs of backgrounds, for different view distances;
• lit and dark floor discs;
• lit, dark and neon-grid columns;
• computer terminals in three different colors, each with on and off states;
• three keycards, one for each terminal;
• a teleporter, also with on and off states;
• two other items;
• one enemy with three states.

HUD elements not included.

All 27 pieces are in SVG format (made with Inkscape). Colors from the DB16 palette.