I think, that the comments here should mainly be about the game in question (that's why I mentioned the off-topic thing) and not about retro gaming in general etc. :) A quick last word on the numbers. Let's first take a look at the total number of games for the C64 by looking at GameBase64. There are currently around 30.000 games in the current GB64 v19
https://gb64.com/search.php?h=0
You can definitely subtract around 10.000 from that number, because these are only little basic-programs and not really finalized games, but the range of games for the C64 is definitely still very very huge then. I then searched the CSDB for all new games, released for the C64, just in the last 15 years and the search-engine found exactly 1.300 games, released since 2009 and many of them are also really good. You can also subtract some of these, because some games have different versions, but still the result will be over 1.000 new games then, since 2009. I have added this search-result as an image, because it doesn't seem to work, to directly link to the search-results of the CSDB's advanced-search-engine.
I don't know what the Spectrum looks like, but it's hard to imagine, that more new games have been released for it, in the same time. Possible is everything, but i don't think, this will be the case.
But whatever, now it should be about "River Barrage" again, I think. Otherwise Richard maybe will wonder, what this topic is all about here, on the site of his River Barrage game. *lol*