I'd love to see this game continued to be developed. Taking the theme "Loop" to mean a tower/wave defense where your main weapon is a train on tracks is super fun. Having a fully upgraded train do a drive-by past a large group of tangerines is so satisfying; it's obvious that the foundation for a great game is here, but currently it feels like it needs a bit more time in the oven.
(On that note, if you do decide to continue developing it, please let me move my camera around freely. I dunno if it's a monitor-size issue, but the top and bottom sides kept getting attacked by things I couldn't see)